The Instigator
Con (against)
0 Points
The Contender
Pro (for)
4 Points

Is There Evidence for God?

Do you like this debate?NoYes+4
Add this debate to Google Add this debate to Delicious Add this debate to FaceBook Add this debate to Digg  
Post Voting Period
The voting period for this debate has ended.
after 1 vote the winner is...
Voting Style: Open Point System: 7 Point
Started: 9/12/2011 Category: Religion
Updated: 6 years ago Status: Post Voting Period
Viewed: 2,773 times Debate No: 18302
Debate Rounds (4)
Comments (23)
Votes (1)




The Issue of the existence of a God is a highly contentious one. In this debate, I hope to argue that there is no evidence to support the position that God exists. I will not be arguing that God definitely does not exist, I merely hope to defend the position that there is no argument for the existence of God that has been successfully put forward without convincing rebuttal.

If it isn't presumptuous of me, I'd like for the debate to take the following format

Round 1: Intro and Clarification of Position
Round 2: Opening Statement
Round 3: Rebuttal
Round 4: Closing Statement


Thanks for the topic boss. Let's do this.
Debate Round No. 1


In my opening statement, I will be defending one basic point. I believe that natural explanations are better than supernatural explanations. We have never observed and verified a supernatural explanation, and every formerly unanswered question that has been solved has been with a natural explanation. A prime example of this is biology. Up until Darwin, it was perfectly obvious to all that life on this planet must have had a designer, a creator, a God. Everything in nature seemed so perfectly designed. Darwin came along and showed that life didn't have to have a designer, that it could be explained through natural processes, namely, the process of Evolution via Natural Selection. Now, we have plausible explanations for the remaining mysteries of life, such as the origin of the universe and the origin of life, these explanations are not proven, I concede that, some scientists think they may never be proven. But purely as a matter of probability, the natural explanation is always more likely than the supernatural explanation. If my opponent wishes to contend that we don't have plausible explanations for these matters, then I look forward to hearing them and hopefully addressing them in rebuttals. For now, I shall turn the floor over to the opposition, to whom I extend my gratitude for accepting this debate, and I look forward to hearing what he has to say.


Thanks boss. We will be delving into philosophy and modal logic to prove God's existence. These are some classical arguments advanced by modern philosophers to prove God's existence.

Hartshorne Ontological Argument

(P1) God is perfect (from the definition of God)
(P2) Perfection cannot exist contingently. (premise)
(P3) If God exists, then he necessarily exists (exists in all possible worlds). (from P1 and P2)
(P4) God is not impossible (there is a possible world in which God exists). (premise)
(P5) If p is necessarily true, then p is actually true (modal axiom).
(P6) If God necessarily exists, then God actually exists. (from P5)
(P7) If God does not actually exist, God necessarily does not exist (does not exist in any possible world). (modus tollens from P6)
(P8) God either actually exists or does not actually exist (Principle of Excluded Middle).
(P9) God either necessarily exists or necessarily does not exist. (substitution, P6 and P7)
(P10) God necessarily exists. (P9, P4, disjunctive syllogism, i.e. if there is a possible world in which God exists, it cannot be the case that he does not exist in all possible worlds)
(P11) God exists. (P10, P3, modus ponens).

Plantinga's Ontological Argument

1. A necessary proposition is defined as one that, if true, is true in all possible worlds. (definition of necessary propositions in modal logic)
2. God is defined as a maximally great being - meaning one that exists necessarily and is necessarily omniscient, omnipotent and perfectly good. (definition of God)
3. Possibly God exists. (Premise)
4. There is a possible world in which God does exists. (By 3)
5. Therefore, there is a possible world in which it is necessarily true that God exists. (By 2 and 4)
6. God exists in all possible worlds. (By 1 and 5)
7. Therefore, God exists. (By 6 and since necessarily true propositions are true)

All that is left is to prove premise 3, but this follows from the fact that things that are logically possible are things that have no contradictions in their definition. So, for example, it is logically possible that if you pick a number between 1 and 10, the number is 5, which means that there is a possible world where the result is 5. In the same way, if God can logically exist, then there is a possible world in which he exists.

To understand necessary and possible existence, picture a checkerboard. To say something possibly exists is to say that you put an X in one box where that thing exists (one possible world). To say something necessarily exists means that you must put an X in every single box (every possible world). If you agree that God is possible, meaning you can conceive of a being that is omniscient and omnipotent and cannot find a contradiction there, then there is a possible world where God exists, so put an X in one possible world. But since by definition God must necessarily exist, that means that if there is an X in one possible world, God must exist in all possible worlds. Because God either necessarily exists (exists in all possible worlds, with X's in each box) or necessarily does not exist (with no X's in any boxes). So once you've placed an X in one box, you know that it's not possible for God to necessarily not exist, so he must necessarily exist.

Cosmological Argument

1. Something cannot come from nothing.
2. Whatever begins to exist has a cause. (from 1)
3. The universe began to exist.
4. The universe is infinite.
5. A finite entity cannot create an infinite entity.
6. God is infinite.
7. God caused the universe to exist. (from 6, 5, 4, 3 and 2)

Teleological Argument

There are certain constants in physics, like the value of the strong force, which if altered by even the tiniest fractional amount would create a completely unstable universe. All of these constants being in exactly the correct range is impossible, so some entity must have fine-tuned the numbers by design and that entity is God.

The argument goes: "It was recognized centuries back that conditions necessary for the flourishing of life were fairly tightly constrained (making the move to design in natural conditions and laws inherently attractive), but not until quite recent times has it been revealed through science itself just how wildly tight the constraints actually are, and just how many separate things have to converge, each within a miniscule value interval. For instance, here are two examples taken from Robin Collins:

1. If the initial explosion of the big bang had differed in strength by as little as one part in 1060, the universe would have either quickly collapsed back on itself, or expanded too rapidly for stars to form. In either case, life would be impossible. (As John Jefferson Davis points out, an accuracy of one part in 1060 can be compared to firing a bullet at a one-inch target on the other side of the observable universe, twenty billion light years away, and hitting the target.)

3. Calculations by Brandon Carter show that if gravity had been stronger or weaker by one part in 1040, then life-sustaining stars like the sun could not exist. This would most likely make life impossible. (Collins 1999, 49.)[37]

In light of these and other examples, Collins remarks that "Almost everything about the basic structure of the universe … is balanced on a razor's edge for life to occur." (Collins 1999, 48).

There is some disagreement over just how many such independent factors there are, but by some counts there are over 100, although not all requiring the above degree of precision.[38] But the apparent probability of all the necessary conditions sufficient to allow just the formation of planets (let alone life) coming together just by chance is utterly outrageously tiny—by Roger Penrose's calculation, the probability of chance alone producing cosmoi capable of producing planets is 1 in 10 raised in turn to the 10123 (Penrose 1990, 343–4)."


My opponent's entire case seems to hinge on 1) God cannot be verified and 2) supernatural explanations are always wrong.

The problem with the first is that it is just an appeal to ignorance. Just because God cannot be verified does not mean that he does not exist. The above philosophical arguments prove God's existence, even if he cannot be verified.

In regards to the second, I never claim that the Judeo-Christian God exists or that the Bible and Creationism are correct. I merely prove the existence of a maximally great omnipotent/omniscient being (Ontological argument) and I prove the existence of a Creator of the Universe. Personally, I believe that the Creation Tale is an allegory is not meant to be taken literally. God created the Universe and caused the Big Bang (since everything has a cause), created the perfect constants for life to exist (a stable strong force, stable constant for gravity, etc), and then sat back and let physics form planets and let evolution take its course.

So my opponent could prove that the Bible is 99.99% wrong, and I can still win this debate as long as I win that it is rational to believe God exists.
Debate Round No. 2


In my opening remarks, I defended the position that natural explanations are preferable and are more likely than supernatural explanations. In my opponents rebuttal to this point he claims that my case hinges on god not being verifiable and supernatural explanations are always wrong. On the second point, I didn't say that supernatural explanations are always wrong, i said that while we have verified countless natural events, we have never been able to verify a supernatural event, therefore I think it is logical to conclude that where a plausible natural explanation can be provided for something as yet unexplained, then, even should that natural explanation be unproven, it is more likely than an explanation which required unnatural forces to explain it, so therefore i think that my opening assertion still holds up.

Now, what about the arguments that my opponent provided for the existence of God, well we heard two versions of the ontological argument, one of its premises being that God is defined as a maximally great being, some of the attributes of which are omnipotence, omniscience and perfect goodness. The ontological argument hinges on these attributes being logically consistent with each other. Let's take a look at omnipotence vs omniscience. If a being were truly omnipotent, then he is all-powerful, nothing is impossible to this being. Omniscience means that this being is aware and has full detail of every event that has happened in the past, present and future. When you attempt to reconcile these two attributes, it leads to logical contradictions. If a being is omniscient, then he is aware of every decision that he will make in the future. In a sense, everything he will ever do has already happened, the decisions have already been made. This contradicts the attribute of omnipotence. After all, how can a being be omnipotent if he cannot even change his own decisions.

But the ontological argument faces more problems. For example, is the concept of a necessary being an intelligible one? A necessary proposition of a triangle is that it has three angles. This yields only the conditioned necessity that if a triangle exists, then it has three angles. We can apply that further, lets say for the moment than one of the attributes of "X" is that it exists. The farthest that you can get with that argument is IF X exists, then X necessarily exists. IF God exists, then God necessarily exists.

Another thing to consider is that, as the philosopher Immanuel Kant put it "being is obviously not a real predicate". What I mean by that is being cannot be considered an attribute of the concept of something, but rather implies that there is something to which the concept corresponds to, in this case, God.

Now, the Cosmological argument.
The arguments first two premises are incorrect. In particle physics, particles are constantly jumping into existence without cause. This is what is known as a quantum fluctuation, it is a temporary change in the amount of energy at a point in space, which allows the creation of these, what are called, virtual particles.

In addition, the third and forth premises have no evidential nor argumentative support. How do you know that the universe began to exist? How do you know that it is infinite? If you can answer these than i will address them a little more in my closing remarks.

Little to quarrel with for premise five, premise six is unsubstantiated, but even were i to grant that god were infinite, premise seven relies on him existing before it can work. The farthest you can go, even were I to grant that premises one to six where all substantiated and accurate, is to say that it is possible, and nothing more than that, that God created the universe.

So, what about this fine-tuning, this teleological argument, now bear with me on this one, it gets a little technical.
Let's look at the big bang example. Stephen Hawking, in his book, "A Brief History of Time", writes "The rate of expansion of the universe [in the inflationary model] wold automatically become very close to the critical rate determined by the energy density of the universe. This could then explain why the the rate of expansion is still so close to the critical rate, without having to assume that the initial rate of expansion of the universe had to be carefully chosen". In other words, the inflation model, which is widely accepted by astrophysicists and cosmologists, takes care of this problem, and no fine tuning is necessary. Inflation also deals with the issue of the mass density of the universe, to which I'm now coming.

There are five examples of alleged fine tuning, not all of which were suggested by my opponent i know, but i like to fight on my feet when i can, for which it is claimed that if any of them were any different, then life of any kind would never have evolved. The other constants are solely to do with the low probability of our kind of life, if these were any different, they still might permit life different to our own, we simply don't have enough information to rule that out.

Therefore I would like to focus on these five main constants, these are as follows:
Ratio of Electrons to Protons = 1 part in 10 to the 37th power
Ratio of Electromagnetic Force to Gravity = 1 part in 10 to the 40th power
Expansion Rate of the universe = 1 part in 10 to the 55th power
Mass Density of the Universe = 1 Part in 10 to the 59th power
The Cosmological Constant = 1 part in 10 to the 120th power

We have already discussed the expansion rate of the universe, so lets look at the ratio of the electromagnetic force to gravity. There is no one universal way to describe the value of the gravitational pull of an object. It depends on the mass of the object in question. The reason the gravitational force as a whole can be described as small, is because the masses that are being worked with, stars, planets etc. are small, on a cosmological scale. The real question here is why are the masses so small, which we are able to answer. In the standard model of particle physics, which to date has agreed with all observations pertaining to the field in question, all particle masses are intrinsically zero. They pick up a small mass as a correction, caused by what is known as the Higgs field, which is what gives matter mass. So we have given a natural explanation for 3 of the 5 constants that, if different, would prevent any kind of life, so lets now examine the ratio of protons to electrons, now this is a very simple explanation, the ratio is exactly what it should be if the total energy charge in the universe is zero, which incidentally is what it should be if it came from nothing.

As for the cosmological constant, if my opponent wants me to explain that in detail then i shall do so in my closing remarks, because it is a highly technical issue, that would take a long and laborious explanation that i doubt I have time to fully give justice to in the 1000 characters that remain to me, so i shall turn the floor over once again to my opponent, and see what he has to say about my responses.


Thanks for the quick response boss.


R1) Logical incoherence

My opponent's first argument against the ontological argument is that omnipotence and omniscience are incoherent. This is a pretty standard objection, which can be easily rectified because the omnipotence paradox is self-refuting. [1] There are two types of omnipotence: maximal omnipotence and common omnipotence. Maximal omnipotence is the ability to do absolutely anything, with no limitations, including the logically impossible. Common omnipotence, which is used by many philosophers and Christian thinkers, is the ability to do anything that is logically possible.

So my opponent says that God cannot have maximal omnipotence and maximal omniscience because then God would be able to do something that is logically impossible: to both know all of his decisions ahead of time and to change his mind. However, from the definition of maximal omnipotence is the ability to do things that are logically impossible, so if we accept that God is maximally omnipotent and omniscient, he has the ability to do things that defy logic. This is why the omnipotence paradox is self-refuting.

If we accept that God has common omnipotence and omniscience, then God either cannot know his decisions with 100% certainty ahead of time, OR he cannot change his mind, assuming these imply a logic contradiction, because God can only do what is logically possible. However, it's not even clear that the two imply a contradiction; if God changes his mind, it's merely the case that his omniscience will inform him ahead of time of his intention to change his mind. Let's pretend for a second that you can see the future and you know that in 5 minutes, you will eat an apple. If after two minutes, you decide to eat a pear and are no longer hungry, the future will change and you will see that in 3 minutes you DON'T eat an apple. It's true that this is not an example of maximal omniscience, but it is an example of common omniscience.

R2) Conditioned necessity

My opponent's argument here is that the farthest you can get with the argument is "if God exists, he necessarily exists." However, this is just factually wrong. It's easier to see in formal logic, but fundamentally, the conclusion of the ontological argument is JUST that God exists. I'll show exactly in formal logic how the Ontological Argument takes the statement my opponent made "If God exists, he necessarily exists" and goes further to prove God does exist.

G = God exists
n (x) = x is a necessary proposition
~ = not (not A is ~A)
=> means implies (if A, then B is A=>B)

Formal Argument:

(1) G => n(G)

(2) ~n(~G)

(3) ~n(G) => n(~n(G))

(4) n(G) => G

(5) n(G) OR ~n(G)

(6) n(G) OR n(~n(G))

(7) ~n(G) => ~G

(8) n ((G) => n(G))

(9) n(~n(G)) => n(~G)

(10) n(G) OR n(~G)

(11) n(G)

Explanations for the above:

(1) Translated: If God exists, he necessarily exists. [my opponent's premise]

(2) Translated: "It is not impossible that God exists" or "It is not true that God necessarily does not exist" [this comes from the definition of possibility as existing in a possible world, which means it is not possible for God to NOT exist in all possible worlds]

(3) Translated: "if it is not true that God necessarily exists, then it is true in all possible worlds that ‘it is not true that God necessarily exists.'" [this is Becker's Postulate, that if something is not true in all possible worlds, then in each individual possible world, it should still be necessarily untrue]

(4) Translated: "if God exists in all possible worlds, God exists." [definition of logical necessity; if something has a certain property in all possible worlds, it obviously also has that property in THIS world, since this world is a possible world]

(5) Translated: "God either necessarily exists or does not necessarily exist." [this is from the Law of Excluded Middle, which says that for any proposition p, p is either true or untrue; there is no middle ground; this is inherently logical; 2+2 either equals 4 or it doesn't]

(6) This is just a substitution of 3 and 5 because if ~n(G), then n(~n(G)), so we replace ~n(G)

(7) In logic, this is called modus tollens or forming the contrapositive of #1. Forming the contrapositive involves flipping the if and then statement and negating both, while distributing the negative correctly. This is logically equivalent. For example, "if I bought milk, then I went to the store" = "if I didn't go to the store, then I didn't buy milk."

(8) Translation: "it is true in all possible words that ‘if God exists, he exists necessarily'" [from #1, if something is not logically contradictory, it should be true in all possible worlds; if God exists, he exists necessarily is not logically contradictory]

(9) Since the contrapositive in #7 is equivalent to #1, we substitute it, since #8 is essentially n(#1), and then we distribute the n.

(10) This is a substitution of #5 and #9 since if n(~n(G)) is true in #5, then n(~G) is true (from #9)

(11) This is called a disjunctive syllogism using #10 and #2. Since we know from number 2 that n(~G) is not true, we can remove it from our OR statement, just like if 2+2 is 4 or not 4, and we know it's "not not 4," we can remove that from the or statement.

So the Ontological Argument uses the supposed conditional existence my opponent talks about to prove that God's existence is necessary, NOT conditional.

In fact, we could use the same style of argument to prove that a triangle exists because it is possible that it exists, and if there is no logical contradiction in its necessarily having 3 angles and existing, then it does exist. This seems obvious. If a triangle always has 3 angles, it of course also exists, because you have to be able to conceive of it or draw it to know for certain that it always has 3 angles. A triangle that does not exist cannot necessarily have 3 angles.

What my opponent stated is also logically incoherent. He says, "lets say for the moment than one of the attributes of "X" is that it exists. The farthest that you can get with that argument is IF X exists, then X necessarily exists." I think my opponent means "one of the attributes of X is that it NECESSARILY exists." But by my opponent's logic, if one of the attributes of something, say you the reader, is that you exist, according to my opponent, the farthest you can get with this argument is that "IF you exist, then you exist," since according to him, all attributes are contingent on existence. This, however, makes no logic sense since we CAN know the existence of certain things for certain.

R3) Kant – "existence is not a predicate"

Kant's argument is essentially that if we say that A has the property of B, we are inherently saying that A exists, i.e. we are saying "we can call out and find A somewhere in the world and A has property B." This is a classical argument against older Ontological arguments, like Anselm's, but modern day philosophers like Plantinga have overcome it.

But first, the problem of saying that existence is not a predicate. 1) If existence is not a coherent predicate, neither is non-existence, so it is impossible also to say that God doesn't exist. 2) If existence isn't a predicate and naming something implies that it exists, then it is impossible to say anything doesn't exist. For example, saying that Socrates doesn't exist requires that Socrates at one time DID exist. But going even further, saying that dragons do not exist would require them to exist first in order to conclude that they have the property of non-existence. [2]

To give an example, if I wanted to say "triangles have 3 angles" that translates to T => 3, which is "if it is a triangle, then it has 3 angles." My opponent tells us this implies the statement "if a triangle exists, then it has 3 angles." But then the statement "dragons don't exist," written as D => ~E, translates to "if dragons exist, then they don't exist." Existence has to be a predicate or else we can't conclude that anything doesn't exist.

Some philosophers have put forward a solution that if we're talking about an individual entity, existence can be a predicate. When we say horses have 4 hoofs, we are of course saying both that we can find something called a horse and it will have 4 hoofs. But when we say "Socrates is a philosopher," we are not implying that we can currently find Socrates, now that his body has long ago decomposed. Since God is a specific entity, not a class of indefinite entities (like horses), it makes sense to use existence as a predicate.

Lastly, Plantinga argues that although it may be true that existence simpliciter (existence in THIS world) cannot be a predicate, necessary existence can be a predicate because it DOES make logical sense to question whether a concept that exists in this world ALSO exists in other possible worlds. Saying "a horse has 4 hoofs," does imply existence simpliciter since a horse must exist in this world to have 4 hoofs. That doesn't mean that horses exist in ALL POSSIBLE worlds (necessarily exist). Since the Ontological argument assigns necessary existence as a property of God, not existence simpliciter, it doesn't run into Kant's critique.


I can actually simplify it to:

1. Whatever begins to exist has a cause.
2. The Universe began to exist.
3. A necessarily existent omnipotent being must have caused the universe to exist.

#3 follows because an entity that created the Universe must have existed, existed in all possible worlds, and been immensely powerful.

My opponent claims that something may spring from nothing in particle physics. The first problem with this is just because it appears to spring from nothing, this merely means that we have failed to yet deduce or observe the cause, not that a cause does not exist. In fact, something must have created the quantum fields that allow for the phenomenon of quantum fluctuation.

In addition, particles created through quantum fluctuation are known as virtual particles because they don't really exist: it is a particle and anti-particle pair that quickly annihilate each other. The creation of anti-matter means that "something" is not really being created because "anti-something" is created at the same time. I don't claim to perfectly understand particle physics, but the modern view is that energy is not actually created by quantum fluctuations. "In the modern view, energy is always conserved, but the eigenstates of the Hamiltonian (energy observable) are not the same as (i.e. the Hamiltonian doesn't commute with) the particle number operators." [3]

My opponent asks how I know the Universe began to exist. This is commonly accepted in physics that nothing existed before the Big Bang. None of my opponent's other arguments apply to this simplified proof. The cosmological argument does not pre-suppose God's existence to prove its conclusion since his existence follows from the premises.

I likely have not done justice to the Cosmological argument. Here is a better version:

(1) Every contingent fact has an explanation.
(2) There is a contingent fact that includes all other contingent facts.
(3) Therefore, there is an explanation of this fact.
(4) This explanation must involve a necessary being.
(5) This necessary being is God. [4]


The argument here is that there are certain constants in physics that if altered by even tiny amounts would result in the universe being completely different than it is now and life being untenable, so some entity must have fine-tuned these numbers. In fact, the numbers my opponent cites in his previous round are how much those constants (such as the ratio of electrons to protons), would have to be altered to make life unviable. If the Cosmological Constant were altered by 1:10^120, life would be unviable (according to my opponent).

Now, my opponent claims that the expansion of the universe is explained by inflation. However, inflation in the perfect range is caused by the Cosmological Constant being in the perfect range. [5] It's too bad my opponent never gets time to discuss this.

But it also doesn't answer the argument from Robin Collins, that if the Universe INITIALLY expanded 1x10^1060 slower, it would have collapsed on itself, or 1x10^1060 quicker, it would have expanded too fast for planets to form. My opponent's argument about inflation only proves why the Universe is CURRENTLY expanding at the near perfect rate; it doesn't describe the early nanoseconds of the Universe.

My opponent also never answers the Roger Penrose's calculation: the probability of chance alone producing cosmoi capable of producing planets is 1 in 10 raised in turn to the 10123. This calculation includes multiple factors.

Fundamentally, every argument my opponent makes here is a straw man, since I never referred to those specific ratios he is refuting. The CONSTANTS in physics equations are more important than those ratios, since constants could in theory be anything, but are required to be in the exact range they currently are to support life.

For example:

"strong nuclear force constant
if larger: no hydrogen would form; atomic nuclei for most life-essential elements would be unstable; thus, no life chemistry
if smaller: no elements heavier than hydrogen would form: again, no life chemistry

weak nuclear force constant
if larger: too much hydrogen would convert to helium in big bang; hence, stars would convert too much matter into heavy elements making life chemistry impossible
if smaller: too little helium would be produced from big bang; hence, stars would convert too little matter into heavy elements making life chemistry impossible

gravitational force constant
if larger: stars would be too hot and would burn too rapidly and too unevenly for life chemistry
if smaller: stars would be too cool to ignite nuclear fusion; thus, many of the elements needed for life chemistry would never form

electromagnetic force constant
if greater: chemical bonding would be disrupted; elements more massive than boron would be unstable to fission
if lesser: chemical bonding would be insufficient for life chemistry"

My opponent seems to claim that gravity has no constant. Not true. gives the exact number.

He talks about how bosons (subatomic particles) are said to have no mass, but the particles they make up (like protons and neutrons) definitely do have mass. If they had no mass, they would have no energy (E=mc^2) and nuclear explosions would not be possible. Thus, my opponent never really even refutes his own straw man, that the mass density of the universe, if altered by 1x10^59, would make life unviable.

Debate Round No. 3


boss1592 forfeited this round.


Guess I win this one . . . Vote Pro.
Debate Round No. 4
23 comments have been posted on this debate. Showing 1 through 10 records.
Posted by tejretics 2 years ago

(sorry for necro-posting)

While the Hartshorne ontological argument you present is largely fine [I mean, there are multiple ways to refute it, but this is in reference to your formulation], I'm confused as to what entails the conclusion. Basically, at P11, you say "God exists" is entailed from P10 and P3 via modus ponens. Let me phrase the basic argument in modus ponens format:

(1) If God exists, then he necessarily exists (P3)
(2) God necessarily exists (P10)
(3) God exists

(3) isn't entailed by (1) and (2) -- this is a fallacy of affirming the consequent. [] Modus ponens is, by definition, "affirming the antecedent," not the consequent. Modus ponens is logically valid; affirming the consequent is not. There are two valid forms of deduction: (1) affirming the antecedent (modus ponens) and (2) denying the consequent (modus tollens).
Posted by bluesteel 6 years ago
most cosmological argument eventually boil down to what caused the Big Bang. Although I wouldn't make this argument, some people argue like my opponent that quantum fluctuations could have caused it (something from nothing). Personally, I don't think that's a winning argument. I prefer the argument from Hawking that the Big Bang created space-time, so the Big Bang is a singularity - it does not require a cause and asking what caused the Big Bang, i.e. what happened "before" it is incoherent, since time didn't exist before it, so there is no "before" the Big Bang.

I'd also go with Hume's philosophy of empiricism. We observed an event that didn't have a cause. That should disprove that premise that every event must have a cause. Although that will just lead to you and your opponent chasing each other's tails, since it could be we don't know the cause.
Posted by bluesteel 6 years ago
2) yes, had my opponent made that argument, I probably would have lost the ontological argument. I don't know yet what I would have done.

As for the cosmological argument, a contingent fact is a fact that relies on another fact for explanation. There is a contingent fact that includes all other contingent facts because if every contingent fact needs an explanation, so if we have contingent fact one (C1) explained by contingent fact 2 (C2), then C2 must be explained by C3, explained by C4, explained by C5, etc. The only way to solve this infinite regress is to have one contingent fact that explains all others.

For example, C1: why does a ball drop when I let go
C2: gravity, why does gravity exist
C3: interaction of massive bodies, why do these exist
C4: the big bang, why does that exist
C5: fact that explains all other contingent facts, i.e. God

I think you're questioning the right part of that argument, namely Premise 2. I think another critique is that if contingent facts are explained by non-contingent facts, then Premise 2 also seems to fail. I dunno, you'd have to ask popculturepooka for a better defense of Premise 2. I don't claim to know how to defend these arguments in depth, although I wanted to try for these debates.
Posted by F-16_Fighting_Falcon 6 years ago
It would be nice if you could give an example of a couple of contingent facts and their explanation, then give an example of "THE contingent fact" that includes all other contingent facts.
Posted by F-16_Fighting_Falcon 6 years ago
Okay, here is the better version of the cosmological argument.
(I will assume "contingent facts" to be facts that are contingent on other phenomena happening. Let me know if that is accurate.)

(1) Every contingent fact has an explanation.
(2) There is a contingent fact that includes all other contingent facts.- Not really. Why would that be?
(3) Therefore, there is an explanation of this fact. - If there is such a fact of course.
(4) This explanation must involve a necessary being. - (Paraphrasing: This explanation must involve something that exists for all possibilities) Again IF there is such a fact
(5) This necessary being is God. - Now, you are defining god as a being that exists for all possibilities. That is a really unconventional definition. But my main argument is against premise 2.
Posted by F-16_Fighting_Falcon 6 years ago
2) So you are saying that if your opponent pointed this out, you would have lost the ontological argument?
Posted by bluesteel 6 years ago
1) I think this is technically a valid shortening, but by something perfect, we mean something that is perfect on every possible vector, not just one vector. Just because a perfect unicorn is possible, doesn't mean it exists. But an ultimately perfect being is different than "the best possible unicorn."

2) This is one critique of the argument, that if you start with "God possibly does NOT exist," you end with him NOT existing, so theists have to appeal to OTHER proofs of God's existence to prove that his existence is more likely than his non-existence, basically rendering the ontological argument useless, since it then depends on the cosmological and teleological arguments.
Posted by F-16_Fighting_Falcon 6 years ago
Okay, you are saying that X is perfect and omnipotent. Since X is perfect and omnipotent, if X exists, then X exists in all possible worlds. (because you can't have something that is perfect and omnipotent that only exists in one possible world.

1) To make it shorter: If something perfect (and omnipotent) exists, then that perfect thing exists in all possible worlds.

Making it even shorter: If something perfect is possible, then that perfect thing definitely exists. Isn't this a logical fallacy? Just because perfection is possible doesn't mean it exists for sure.

2) We are still operating under the assumption that something perfect and omnipotent exists. What if I say that there is nothing that is perfect or omnipotent? Then it wouldn't exist in any possible world.
Posted by bluesteel 6 years ago
that particular formulation of the cosmological argument wasn't very good; you can see the one I argued for later in this debate

God must necessarily exist if he exists because you can't have an omnipotent, perfect being that only exists in one possible world. That's a less that perfect existence.
Posted by F-16_Fighting_Falcon 6 years ago
Why is god a being that must necessarily exist? I still don't get what all possible worlds mean in a real life sense but I will assume it means "possibilities". I hope I am close enough.
1 votes has been placed for this debate.
Vote Placed by F-16_Fighting_Falcon 6 years ago
Agreed with before the debate:Vote Checkmark--0 points
Agreed with after the debate:Vote Checkmark--0 points
Who had better conduct:-Vote Checkmark-1 point
Had better spelling and grammar:--Vote Checkmark1 point
Made more convincing arguments:-Vote Checkmark-3 points
Used the most reliable sources:--Vote Checkmark2 points
Total points awarded:04 
Reasons for voting decision: Con did not adequately point out the flaws in Pro's arguments. In the comments section, Pro did it himself when asked. Now the problem for Con is that he was supposed to refute the arguments himself, not his opponent, and not the voters.