[tialaramex]

Certainly Mother Nature is not obliged to have simple easy to understand binaries where it would be convenient for us and so if we think we see such a binary we should keep in mind that maybe we hallucinated it into existence because it was convenient and that's all.

[opello]

I agree wholeheartedly. This strikes me as the way science works. Theories are useful because of their predictive value. If we think of biological sciences as different than physical or mathematical, it seems we have set ourselves up for failure. Yet that seems like exactly the kind of perspective missing and trying to be pointed out by the earlier comment's attempted splitting of the difference to "2.1 parents" to me.

[SJC_Hacker]

It’s a binary that works in 99% of cases. Doesnt seem like a hallucination to me