Comprehensibility: sound vs grammar

[JoatSimeon at aol.com]

>Steve Long

>You act as if you have some special information that says otherwise and
>somehow clearly makes my statement "not make any sense."

>Do you have any proof of this, one way or the other?  Or is this just another
>overstated impression of yours?

-- Mr. Long, he knows the languages in question.

You don't.

Is there an obvious inference to be drawn here?