Could we exist in a Newtonian world?

[chequita guevara]

So I worded it poorly. I thought it was obvious, given the context of the discussion what I meant.

In any event, the cruz of the question that onodera was asking, and that I was answering, is the thought experiment dreamed up Leplace. If we know the exact position and motion of every particle in existence, then we could extrapolate backwards to the beginning of time, and conversely, to the end of time, meaning that everything is predestined and that free will does not exist.