If there is one thing I have learned, it is that people
who develop a reputation for knowing a lot generally get
there by trying to learn however they can. And they are
generally still learning. (Just like the people you see
exercising are the ones who don't need to. Same exact
principle.)
So go ahead, offer the correction if you think you see one.
You might or might not be correcting them for real. If you
aren't, you are probably going to learn something
interesting. If you are, well odds are that (if the
correction was offered politely) they will be greatful.
At least if they are like me. Particularly if they are
like me. I try to be a sponge. But programming is only
one of the things that I have done with my life, and I
have not been programming for that long. There are a lot
of gaps in my knowledge, some of them big, fat and
glaring. If you think you are staring at one - well you
probably are!