<p>Why would one want to take a 4am class anyways? You’d be missing out on a lot of REM sleep - and I’m sure that you, IceQube (with your 2300 SAT score and whimsical “philosophy” threads), are smart enough to know full well the detriments of sleep deprivation: lack of REM sleep renders neuroreceptors insensitive to serotonin and norepinephrine, which leads to impaired cognitive function.</p>