Formal logic Memes

Math nerds, unite! This meme perfectly captures the evolution of mathematical sophistication. Starting with the classic "Q.E.D" (quod erat demonstrandum - "that which was to be shown"), moving to the empty box symbol, then the filled black box, and finally... "Q.E.F" (quod erat faciendum - "that which was to be done"). That last panel with the maniacal grin is every mathematician who's ever flexed by using the ultra-rare Q.E.F instead of Q.E.D to end their proof. It's basically the mathematical equivalent of dropping the mic!

Opening a math paper only to find it's built on Zermelo-Fraenkel Choice axioms is like expecting a gourmet meal and getting handed raw ingredients with "just cook it yourself" instructions. The cat's expression perfectly captures that moment of existential disappointment when you realize the "proof" is just passing the mathematical buck to set theory. Mathematicians in the wild have been known to make this exact face before quietly closing their laptop and staring into the void for 37 minutes.

The eternal mathematical nightmare! That moment in a proof-based math class when your brain perfectly understands the concept but your hand refuses to translate it into formal notation. Your professor's confused expression matches this perfectly when you try to explain, "I swear I get it, I just can't... write it down properly." Mathematical intuition and mathematical rigor are like parallel lines—they understand each other's existence but never quite meet!

The mathematical mafia doesn't take kindly to indecision! In math, axioms are those fundamental assumptions we accept without proof—like "through any two points, there's exactly one line." They're the non-negotiable building blocks of mathematical systems. This meme perfectly captures the tyranny of mathematical foundations—either you accept the axioms or... well, Gru here has some rather convincing counterarguments pointed right at you. No middle ground in formal logic! Next time your professor asks if you understand the fundamental axioms of calculus, just nod enthusiastically. The mathematical hitmen are watching.

Every mathematician's fever dream right here! The top panel shows "proof by contrapositive" getting insulted as a "cheap knock-off," but the bottom panel delivers the perfect mathematical comeback: "proof by contradiction" smugly declaring "I'm the upgrade." What makes this hysterical is that these are actually different proof techniques in formal logic! Contrapositive flips a statement around (if P→Q, then ¬Q→¬P), while contradiction assumes the opposite and finds absurdity. They're like fraternal twins fighting over who Mom loves more, but they're both equally valid! Every math student who's ever confused these two is currently feeling personally attacked.

The beautiful trap of formal logic strikes again! While normal folks hear an absurd hypothetical and react with confusion, logicians are smugly nodding because the statement is technically true. Since unicorns don't exist (sorry, fantasy fans), the condition "when all unicorns learn to fly" can never be satisfied. In formal logic, this makes the entire "if-then" statement true by default—what logicians call a "vacuous truth." It's like promising to give everyone a million dollars if the sun turns into chocolate pudding. Technically, I haven't lied! The whole field of mathematics is built on these pedantic technicalities, and some of us are way too proud of understanding them.

When challenged to "name every male," this genius responded with set theory notation instead of an impossible list. {p : p is male, p ∈ S}, where S is the set of all people is basically saying "the set of all people p such that p is male and p belongs to the set of all people." It's the mathematical equivalent of saying "I'm not writing all those names, but here's the exact definition that covers them all." Checkmate, internet challenger!

The symbol "∃" in math is like a superhero signal for mathematicians! It means "there exists" and sends them into a frenzy of excitement. While normal humans hear "something exists" and shrug, mathematicians transform into proof-hunting maniacs! That backwards E is basically mathematical catnip - it triggers an irresistible urge to find, capture, and dissect whatever dares to exist in their equation jungle. Next time you see a mathematician hyperventilating over this symbol, just back away slowly and don't make any sudden algebraic movements!