Free Will

[Perndog]

Laws of nature are described by scientific theories, and scientific theories get thrown out and replaced every now and then. Bottom line, no one has the absolute, detailed answer to anything scientific. They may come close, but there are always unknowns.

EDIT: Oh, and entropy always increases within a closed system. Humans are not closed systems, because we put things into our bodies (food, water, heat) and things come out. Otherwise, we couldn't progress beyond infancy, because entropy would just drag us down straight from there.