That's a logically flawed conclusion. A semantic problem does not demonstrate a lack of knowledge, and arguing over semantics certainly doesn't prove such a claim, either.
It's kind of like when Gore was trying to play himself off as this technically savvy guy and was meeting with the Cisco people. He mentioned that one of the important products they make is a (as pronounced) "rooter." I've worked with network people for years and I've never heard it called that. It may have been only semantics (technically, his pronunciation is in the dictionary), but it showed a basic lack of working knowledge on his part of today's networking.