Ever opened a math textbook that casually drops "as we know from basic sheaf cohomology" like you learned it in kindergarten? Meanwhile, your brain is struggling to recall that i=โ-1, the imaginary unit we learned in high school! Advanced math textbooks exist in a parallel universe where everyone apparently has a PhD before reading chapter 1. Sheaf cohomology is literally a graduate-level topic involving abstract algebra and topology, but sure, let's pretend that's "basic" while we're still trying to remember if negative times negative equals positive.