Hacker News Disease
The curious thing is, this post is an instance of what it complains about.  Matt is not so far as I know a formally trained psychologist.  So to the extent he's right, he disproves his own argument.<p>The truth is, while intelligence isn't knowledge, it can be rapidly converted into it.  In fact that would do fairly well as a definition of intelligence.<p>And in any case, credentials aren't knowledge either.  Ultimately you have to judge any argument by what it says, not who said it.