[DyslexicAtheist]

>> The “insiders” can immediately tell who is an “outsider.” Often it doesn’t take more than a sentence or two, an odd expression, a term used in the wrong context, a phrase that nobody in the field would ever use.

seems a bit like when you're on top of your game with a certain programming language and feeling bored with stackoverflow questions and mailing lists asking the same old questions. Happy that in software we can easily move on to a new language / concept / idea to keep things exciting.

[tanderson92]

Of course, you can do that in science too. I believe the intent of that quoted text is not to indicate that all questions in scientific fields represented on arxiv, or even most, are answered. The only purpose is that language easily belies who does not "belong"