The failure to understand the gulf that separates humans from animals, and humans from machines, is a source of confusion to rival almost any other.
A central problem for theories of unguided evolution has always been the challenge of building complex biological novelties.
Rude remarks and hurt feelings at a holiday party may seem a trivial matter. Yet this vignette is very telling.
Ever notice that some older people sleep less and sometimes more fitfully than younger people? Sure you did.