Reasoning errors that are almost but not quite full fallacies—arguments that have the appearance of fallaciousness without fully meeting the criteria. Semi-fallacies live in the borderlands between valid and invalid reasoning. An argument might be technically fallacious but practically reasonable; it might contain a fallacy but still point toward truth. Semi-fallacies are the gray areas of logic, where rigid categorization fails. Recognizing them requires judgment, not just memorization of fallacy names. They're the reason fallacy-spotting in online debates is often itself fallacious—because real arguments rarely fit cleanly into textbook categories.
Semi-fallacies Example: "His argument had the shape of a slippery slope, but the slope was short and the steps well-supported. Was it a fallacy or just a prediction? Semi-fallacy—not quite one, not quite not. She couldn't simply cry 'fallacy' and dismiss it; she had to engage the substance. The gray area demanded thought, not labels."
by Abzugal March 7, 2026
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