I can envision observations and experiments that would disprove any evolutionary theory I know.

The equation of evolution with progress represents our strongest cultural impediment to a proper understanding of this greatest biological revolution in the history of human thought.

The world is too complex for subsumption under any general theory of change.

Why, then, do I continue to claim that creationism isn't science? Simply because these relatively few statements have been tested and conclusively refuted.

Life is short, and potential studies infinite. We have a much better chance of accomplishing something significant when we follow our passionate interests and work in areas of deepest personal meaning.

Heydrich, Eichmann, and company therefore invoke the usual trick of argument for breaking a true continuum that lacks a compelling point for separation: choose an arbitrary dividing line and then treat it as a self-evident law of nature.

You put three facts together - that all organisms produce more offspring that can survive, that there's variation among organisms, and that at least some of that variation is inherited - and the syllogistic inference is natural selection.