It is a defence against it. Just not a perfect one.

It's right up there with the question on the form that asks if you are a subversive or not (or whatever the actual wording is). If you were a subversive, wouldn't you be exactly the type to lie about the answer?

What's your argument for that?

I mean, it might be meant as a defensive, sure. But is it any better than excluding women or left-handers?