"What we think of as reality is a continuous synthesis of elements from a fixed hierarchy of a priori concepts and the ever changing data of the senses."

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The contingency of history (both for life in general and for the cultures of Homo sapiens ) and human free will (in the factual rather than theological sense) are conjoined concepts, and no better evidence can be produced than the "experimental" production of markedly different solutions in identical environments.

— Stephen Jay Gould