@J.Hilk

I seem to be a lone voice, so I'll keep it very brief, but I cannot help but comment...

I so strongly do not agree that, e.g., "addition" is:

defenitly inventions by humans

... Of course the symbols or the numeric system (like base 10/12), or the way we measure/express angles (degrees, radians) are indeed human inventions. But a triangle has 3 angles whose magnitudes add up to the same magnitude as the angle of a straight line whether we care to express it, or even notice it, or not. The Sun has a volume which depends only on its radius whether humans sit on Earth and contemplate it or whether humans never evolved. When you start with one apple, and a another apple falls from a tree, there are more apples then there were to start with, even if the only life on Earth turns out to be fruits. In short, there is no invention here, only discovery...

I guess I'll have to plough my lonely furrow in my understanding/beliefs compared to you Qt guys... :)