Are our lives completely predetermined?

[Could_Strife007]

Originally Posted by Tisthammerw

And what reason is there to disbelieve the existence of free will anyway? Arguments against free will are often of the sort “in a purely physical world, free will cannot exist.” I think this is true: in a purely physical world, free will could not exist. But why must we believe in a purely physical world? Why cannot we simply apply logic to the existence of free will to conclude that materialism (the belief that only the physical world exists) is mistaken?

Because, you cannot prove that free will exists, which means that you cannot conclude that our universe is not completely physical.

We can prove that everything in the universe is created from physical particles, whose movement is defined by a potentially predictable path of entropy. This proof is based on repeated and expected sensory perception of experimental data and materials.

If we were to define 'proof' as a repeated belief in an idea, then we could prove that free will exists. But because we cannot prove anything beyond sensory perception, we must now conclude that free will does not exist and the universe is predetermined.