[donh]

In the absence of such evidence, don't we have to allow for the possibility of some non-random cause of evolutionary speciation?

Do we have to allow for the possibility? Sure. Do we have a felt need to bankroll it or teach it in school? Not obviously. Natural causes has turned out the be a satisfactory explanation for things we didn't previously know every time the question has been put to the test so far. Let's not be making stupid bets out of a sense of fairness.

[Sabertooth]

Do we have to allow for the possibility? Sure. Do we have a felt need to bankroll it or teach it in school? Not obviously. Natural causes has turned out the be a satisfactory explanation for things we didn't previously know every time the question has been put to the test so far. Let's not be making stupid bets out of a sense of fairness.

I'm not suggesting that non-random causes are necessarily supernatural.

Isn't it possible for natural causes to also be non-random?