I'll try and blog properly later but for now I just wanted to throw open a question to the (admittedly not huge) audience.

Is there an actual name for the situation where you believe someone's argument is fundamentally wrong in two separate ways, but arguing against them both at once seems contradictory?

(Note: 'arrogance' will not be accepted )

Examples:

Homosexuality is wrong because it is unnatural

(It is natural, but why would it matter if it wasn't?)

Darwin recounted evolutionary theory on his deathbed

(He didn't, but even if he did, it wouldn't affect the validity of evolutionary theory?)

Chemicals are bad because they are man-made

(Well a great many clearly aren't, but since when has man-made meant 'bad' anyway?)

...and I'm sure you can think of your own. I think it needs a snappier title than 'you're-wrong-but-even-if-you-were-right-you'd-still-be-wrong' syndrome. (Note - I'm not actually asking for a debate on these particular arguments themselves (!) - if you disagree with me on their content, I'm sure you can still think of your own situations where this applies...)