New Oxford American Dictionary

LOL about your concern about my mental energy expenditure. At the risk of expending mental energy, I'm wondering how you expect that I would determine that I've learned more than you know??? Perhaps you should PM me everything you know about these subjects so I will have a point of reference!!!

It's fairly obvious that the 3 definitions I noted were not any attempt to explain anything, just posting a standardized meaning. I assumed this was fairly evident, but apparantly not.