Aeronautical fact has nothing to do with opinion. You have answered your own question quite accurately. Yay.

Of course, you did not qualify your question with any description of the stall e.g. "level flight" or "during landing" - so schmleff would be right in reverting to the basic description of a stall being at a critical AOA above all else. The AOA argument holds true in a vertical climb, balistic zero-g flight, and any other situation you can get a plane into. The texts you have quoted do not. Being that our models often see much more unusual attitudes than GA airplanes, taking the wider definition would seem prudent.

If you had pasted in the info you already had first, it wouldn't have looked like you are trying to be a know-it-all.