A topic of study which everyone thinks is useless.
Subjects and how they are useless:
Math-"Durr hurr. Math is useless because I'm never gonna be a mathematician/engineer/physicist/whatnot."
SOSE-"Durr hurr. SOSE is useless because I'm never gonna be a lawyer/politician/historian."
Science-"Durr hurr. Science is useless because I'll never be a doctor/physicist/geologist/whatnot."
Literature study-"Durr hurr. Literature study is useless because I'm never-Wait, what *is* literature study used for, anyway?"