In 2021, I wrote a blog post about how I believed that free will is the result of the uncertainty principle, that our brains are somehow affected by the wave function collapse, thereby giving us true free will. I no longer believe that – but it also doesn’t matter.
The universe is plenty random and you won’t need free will at all.
I have read and watched videos about how the brains works, and it seems to me that the inner workings of the brain is not governed by quantum mechanics after all. Although we have 86 billions neurons and thus they are really tiny indeed, they still operate at too much of a macroscopic level to be affected by the uncertainty principle. The wave function is always collapsed in our brains.
The brain is sculptured during a lifetime both by genes and by how the environment influences it. This creates the personality you have today, with all the opinions and decisions it spawns. I have discovered that I tend to make decisions in exactly the same way, even across months or even years.
I’ll give you a few examples.