I just read Bruce's article in the Chronicle of Higher Ed, and though it was reasoned, judicious, and diplomatic, one bit in it has made me hopping mad. And in that bit of rhetoric I saw what the issue is, or at least I was reminded of it. I don't need to believe in gravity in order to choose not to step out Sokal's window. I don't have to know the inverse-square law, or think that Galileo was a great genius to make the choice.
Aristotelean physics is good enough.
Or no physics at all. Doggies and kitty-cats don't jump out of windows. I do not need, I think, to analyze either the arrogance or the deceptiveness of Sokal's rhetorical device to this audience.