Great question, that's something I specifically thought about. We probably would have interviewed him if he had said "some knowledge of" etc for those bullet points (which would have been truthful). He actually had quite an impressive resume without the fibs.
We probably would have interviewed him if he had said "some knowledge of"...
But as everyone "knows", you just can't use weak language on your resume. And if it just so happens that you were let go of from your last job for some petty, grossly unfair reason, heavens, no one wants to hear the truth behind that!
So people face a lot of pressure to burnish things up, here and there. I'm not saying there absolved of responsibility, when they get caught at having fibbed. But there is something of a Catch-22 at play, here.