you do realize that is a valid argument though, right? The core concept of the no true scotsman argument is the wishy-washy definition of what is being debated. He isn't a true scotsman because a true scotsman would wear a kilt! something like that. If the definition of scotsman is "wears a kilt" the same way a libertarian would say "pure free market" then it is totally valid.

He may wear a kilt, but he doesn't play the bagpipes, so he's no true Scotsman.

Probably referring to you calling the US health care system free market...

Herbert Hoover was a huge activist big government Keynesian.