The immutable, mathematical rules that govern valid reasoning, regardless of content. Think of them as the operating system of rational thought. The big three are the Law of Identity (A is A), the Law of Non-Contradiction (A cannot be both A and not-A at the same time and in the same sense), and the Law of Excluded Middle (either A is true, or not-A is true—no middle option). These aren't suggestions; they're the bedrock upon which all sound arguments are built. Violate them, and your reasoning collapses into incoherence faster than a house of cards in a hurricane.
"You say you both love me and don't love me simultaneously, and that this is somehow a valid emotional state? I don't care what your therapist says—the Formal Laws of Logic demand you pick a lane, or this conversation is over."
by Dumu The Void February 23, 2026
Get the Formal Laws of Logic mug.The messy, real-world application of formal logic where human language, context, and ambiguity crash into pure reason. These are the rules that govern arguments when you're not dealing with mathematical symbols but with actual sentences that mean slightly different things to different people. "A is A" becomes "A is A, unless A is being sarcastic, or metaphorical, or referencing a meme you don't understand." Semi-formal logic acknowledges that while the underlying laws are absolute, their application in human communication requires interpretation, charity, and occasionally, asking "What do you mean by that?"
Semi-formal Laws of Logic"Technically, when I said 'I'm literally dying of hunger,' I violated the Law of Identity because I'm not literally dying. But by Semi-formal Logic, you understood I was hangry and should have offered me a snack instead of correcting me."
by Dumu The Void February 23, 2026
Get the Semi-formal Laws of Logic mug.The unwritten, socially negotiated rules that actually govern how arguments play out in the real world, far from the clean rooms of formal logic. These include principles like the Law of Charity (interpret others' arguments in their strongest form), the Law of Relevance (stay on topic, Karen), and the Law of Proportional Response (your counterargument should match the scale of the claim). They're not mathematically provable, but violate them and you'll find yourself talking alone in a room, wondering why no one will engage with your "perfectly logical" points.
Informal Laws of Logic "He kept demanding I prove a negative, then changed the subject every time I got close to a point. Someone get this man a pamphlet on the Informal Laws of Logic—specifically the section on 'How Not to Debate Like a Gremlin.'"
by Dumu The Void February 23, 2026
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