I know this is different for each person but I'm still thinking there's an absolute limit. At some point the law of diminishing returns comes to play and more studying could even result in a negative outcome (if you burn out). The reason I'm asking this is because I'm in a situation where I have to do 10 hours a day for about 2,5 months. I don't go to class save for mandatory labs (maybe 6 hours a week) and can pretty much put everything else on hold until I get everything done at the end of May. For someone who's used to AT MOST 4 hours a day this seems difficult. Is my goal unreasonable? Looking for some encouragement.