For me it is the fact that our blood contains iron. I earlier used to believe the word stood for some ‘organic element’ since I couldn’t accept we had metal flowing through our supposed carbon-based bodies, till I realized that is where the taste and smell of blood comes from.
Huh, I always thought of us having free will in response to cause and efect, not in place of it. But maybe I’m understanding free will differently?
If the universe is deterministic, it means that every particle has an infinitely predictable path. And our body and brain are full of particles which could only ever move in the predetermined way. And because our thoughts are only movements of neurone, which in turn, as everything, are made of particles, every action of ours would be predetermined and we could never decide otherwise than we did.
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I think Camus might have summed it up best when he said the only real choice (therefore, freedom to exercise will) humanity has is whether or not to commit suicide.