"...quod erat demonstrandum, meaning "which is what had to be proven". The phrase is traditionally placed in its abbreviated form at the end of a mathematical p

"...quod erat demonstrandum, meaning "which is what had to be proven". The phrase is traditionally placed in its abbreviated form at the end of a mathematical proof or philosophical argument when what was specified in the enunciation—and in the setting-out—has been exactly restated as the conclusion of the demonstration." from Wikipedia[0]. I've seen this kind of answer between computer engineering/sciences people as some sort of "you haven't explained anything" response, though in a more thorough reading of OP and response, I can't really say what was the intention. The downvotes on the response would seem to support that interpretation. [0] https://en.wikipedia.org/wiki/Q.E.D https://en.wikipedia.org/wiki/Q.E.D.