The logical error in which something is considered true or false based on arbitrary, often self-serving criteria rather than evidence or consistent standards. This fallacy is rampant in politics and economics, where the same person will demand "rigorous proof" for climate science while accepting election fraud claims based on a single Twitter post. Truth becomes a menu: you pick what you want to believe, and reality is just whatever supports your side. The arbitrary reality fallacy is how people can look at the same economy and one sees booming success while another sees crushing failure—both are looking, neither is using a consistent measuring stick, and both are convinced the other is delusional.
Example: "He used the arbitrary reality fallacy in every argument. When she cited unemployment statistics, he said government data was fake. When she cited private research, he said it was biased. When she cited his own previous statements, he said he'd been misquoted. Reality, for him, was whatever allowed him to win the argument. She stopped arguing, because you can't debate someone who brings their own facts and changes them as needed."
by Dumu The Void February 15, 2026
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