Those menacing eyes! Math textbooks have this magical ability to reference theorems that seemingly exist in parallel dimensions. "As we can clearly see from the Ancient Hawaiian Lemma of 1348..." Clearly?! There's nothing clear about it! 😂
The infamous "proof left as an exercise to the reader" is basically academic for "figure it out yourself, I'm tired." It's the mathematical equivalent of your parents saying "because I said so." And those obscure references? Pure academic flexing. Next time just write "trust me bro" and save us all some time!