The solution, as all thoughtful people recognize, must lie in properly melding the themes of inborn predisposition and shaping through life's experiences. This fruitful joining cannot take the false form of percentages adding to 100—as in intelligence is 80 percent nature and 20 percent nurture, or homosexuality is 50 percent inborn and 50 percent learned, and a hundred other harmful statements in this foolish format. When two ends of such a spectrum are commingled, the result is not a separable amalgam (like shuffling two decks of cards with different backs), but an entirely new and higher entity that cannot be decomposed (just as adults cannot be separated into maternal and paternal contributions to their totality).

"The Monster's Human Nature", p. 60 - Dinosaur in a Haystack (1995)