linguoboy wrote:But this is all (a) anecdotal and (b) cherrypicking. It's laughable to dignify a statement like "I haven't yet met (or heard of) an adopted child that did not want to know its biological parents" with the sobriquet "sociology".
I'm just listing it as one of the ways he defines "nature."
I haven't yet met (or heard of) a biological parent who hasn't made their children cry. Is that a "sociological" argument that biological parents are unfit caretakers?
Yeah, just a bad one since (1) you haven't necessarily heard of biological parents who have, (2) you haven't necessarily heard of non-biological parents who haven't, (3) making your children cry once in a while doesn't necessarily make you an unfit caretaker, and (4 - I know you were waiting for this) anecdotes ain't evidence (although I think in some circumstances they're acceptable for the purpose of making a logical point by getting the listener to imagine how a situation works).
Aenye begins with the conclusion (homosexuals shouldn't be parents) and then justifies it with appeals to a shadowy authority which just so happens to agree with him 100%. He is "playing on the ambiguity of the term" by defining it as whatever happens to suit his assertions. Its circularity is determined by its unfalsifiability.
In the long run, yes, it's inconsistent, and often he relies on circular reasoning. However, within each point he makes, he seems to only use one definition of nature, and his reasoning with it isn't always circular. For example, he reasons that, since you need a man and a woman to make a baby, only men and women should get married. The first clause is true and a valid and reliable interpretation of nature (in this case, the biological definition); his error comes when he assumes that you should only get married if you intend to create a child in that union. Now, maybe there's some circularity down that path, but by then he's not relying on "nature" anymore, just some kind of utilitarianism.