AGAIN: many people do not hear the tones. I am a PRIME example for that.
You can say Ma Ma Ma Ma Maa and I can not distinguish which Ma is dog, which is horse, which is s-h-i-t and so on. I can only hear: oh, they are different. And that is for over 50% of Europeans, especially if they had no music education. If you play two notes on a piano that are side by side: I can only say, they are different. I do not hear which one is the higher one.
You are simply completely uninformed.
And with what completely unappropriated boldness do you assume you know anything about my hearing capabilities?
"If you sleep during class and dream of last night's teerak from Nana plaza who left your condo an hour ago instead of studying, then yeah they become difficult"
Under the belt line B-S, buy a guy who wants to talk about tones. Wow.