i fell under the rabbit hole, actually scratch that. its a black hole, i am never coming back and i will never see the world the same way as i did before the fateful day that youtube did a good thing of recommending prof jiang's lectures to me. there is a before-sankhini ( the BS era ) and after-sankhini (the current era). my mind is opening and i refuse to close it again, kthanks. i used to just watch his classes, then i realised i am forgetting so much and its absolutely a waste of time if i dont take notes to think about the things he talks about later. so, here we are. i did take notes, but this is gonna be free public service. you are welcome, child. ;D