Sorry, but stall is not just a function of angle of attack (alpha). It's also a function of the Mach number - even for 'low speed' stalls
Cor, I supect that will have a few people wondering....
I know what you mean but might it not be better to say something more on the lines of:
'while the stall is only a function of angle of attack, the precise function is affected by Mach number and aircraft configuration etc etc'
Sorry if you see that as a nitpick but I think the earlier poster was just trying to make the point that a wing does not stall because of the speed it is travelling at. And my word is that not the truth!