Why do people seem to think that "studying" is just filling up a bucket? As if you can learn more just by adding MASSIVE amounts of time?
People who have a PhD, people who win the Fields' Medal (math), the Heineman or Shaw Prize (Astrophysics), or the Nobel prize (for Arts or Sciences); people like that?
They don't study for 18 hours and skip meals. Because you aren't just pouring knowledge into the bucket of your brain; it doesn't fucking work like that, and people who do that have a failure rate of something like 70 to 80%
Because humans aren't buckets; I know that's a tautology, but...
I mean, you can't teach a horse calculus, yanno? And it's not because horses aren't cool, nor because you can't communicate with them; it's because you didn't start early enough. If you have about 1,432,000 years to help them evolve into having a human brain, then... yeah; you can teach a horse calculus.
Otherwise, they just keep being a horse.
Bu the same token, humans have brains that work like a paranoid primate who likes to divide by 12, so you won't find it useful to simply read books from cover to cover; even with an eidetic memory, humans need the time to creatively apply the new knowledge to multiple situations before they actually learn the knowledge.
Hell, that's why the teacher won't let you use a calculator on your Math 95 homework and/or Final; it's so that you will access that knowledge outside of class without needing a technological device for thinking about it, leading you to a greater understanding.
Just pourin' water in a bucket don't give ya soup; ya gotta season it, first.
Please don't tell me you actually read all this...?!