Yes, there can only be one absolute. An idea of everything via the singularity.
No, absolutes can be separated. You don't need to be conscious of an idea for it to absolute.
Yes, only one. This is the definition of absolute. For example: x = 1+1, this means x=2. If we reword this: What is the absolute value of "x" if x=1+1? The absolute value of x is x=2; or 2. x can NEVER be anything other than 2 in this example.
If absolute value of x is 2, then how come there is only 1 absolute? 1 is not 2. Failllll
If everything ever was in a thing called a "Absolute" you might say cant a whole new brand of reality exist beyond that? Well maybe but in total those two reality's combine and make a even bigger absolute, So far i dont think you can get out of it.
Although I think your question needs clarification, you don't have to be conscious of an idea for it to be true. Also, X can equal two numbers at the same time in equations, or just because it's a variable. Schrodinger's cat is a good example of this, the cat could be dead, or the cat could be alive. They are both possibilities that contradict the other.