That's what I was thinking -- it SEEMS to be this fallacy maybe to an idiot, but there IS such a thing as objective truth and criteria for things like membership.
Also, I don't see the utility of "ALL X are Y." in the first place. If I could posit that 99.9% of X are Y, I'd be just as happy. There are always exceptions to every rule.
Similarly, I don't care if you can show me one or two black men who hate basketball, who never eat (or enjoy) fried chicken, watermelon, or kool-aid. Or who LOVE to swim.
That wouldn't prove anything, except that they are the exception to the rule. Nothing more. The general rule would hold more than ever.
There are a few females in engineering, too. They are the exception. Even among them, many of them don't do as much work, or any work.