So basically, my friends and I are having a serious but small debate. It is concerning that if there is risk involved in a specific act, then one cannot be 100% confident in completing the act. I stated that this was false, that even if there is 99% risk involved, one can still be 100% confident that he or she can complete the said act. My example was a bridge that was over a deep cliff with alligators at the bottom. I said that even though there is the possibility that one could fall off the bridge into the pit of alligators, one could be 100% confident in crossing that bridge successfully. I said this because being 100% confident is based on one's ability to believe in one's self. As a result, this is why I believe that one can be 100% confident even if there is .000000000000001% risk
To be 100% confident in your ability to cross the bridge, you must be sure that there is nothing in your way that can stop you. Unless this bridge gives you a 100% success rate of crossing it (which is impossible because you mentioned there is still a risk in crossing the bridge) you can't be sure that you will cross it. You can be 99.99999999999% sure that you will cross it successfully, but your mind still understands that there is still a risk, a small one albeit. You cannot fully convince yourself that you will cross that bridge because you know internally that there is still a risk. If one believes a risk is present (which you state in the question is true), then one cannot be sure of completing the act successfully. To understand a risk is to take it into consideration with your actions.
I completely disagree with madcusbad17. Lets take a different bridge for example. This bridge is very short, and is made of brand new wood. The drop from the bridge to the ground is 1 ft, and the only fault in the bridge is that the gap between the middle piece of wood and the one to the right of it is .5ft. However, the structure is still strong. So according to madcusbad17, there is a potential risk, and in this case, its falling in a gap that is only half a foot long. So there is the RISK of putting your foot in the gap and falling down .5ft, but then are you telling me that one could not be 100% confident in being able to cross that bridge just because of a gap that is .5ft wide? Even if the risk in that case is 1% because of the gap, one can assume, with 100% confidence that, even though there is a .5ft gap, there is no way this can stop him or her from crossing the bridge. Even if there are many other, more dangerous, variables in the way.