[mprime]

Well, the only (literal) meaning of "know" that doesn't fit what everyone else on this thread was thinking it meant is:

(3) archaic : to have sexual intercourse with

So we should rephrase

"Odds are, one should never trust a programmer who thinks they know [X]. Odds are they only think they know really know [X], but they haven't gone too much farther than figuring out how to use the library."

With something along the lines of

"Odds are, one should never trust a programmer who thinks they have had sex with [X]. Odds are they only think they have had sex with really have had sex with [X], but they haven't gone too much farther than figuring out how to use the library."

What is this smut in my Hacker News?

source: http://www.merriam-webster.com/netdict/know

Or perhaps you meant implications of the word "know" in play? (:

[earl]

Well, I always did feel like I was getting fucked by C++.