fallacy; paralogism
A technical term in logic and philosophy, referring to an error in reasoning. Sometimes specifically a paralogism (a fallacy in which one does not realize the error).
That argument contains a fallacy.
I learned about paralogisms in philosophy class.
Compound of 誤謬 (fallacy, error) and 推理 (reasoning, inference). The exact historical derivation is uncertain; the term is used in modern Japanese philosophy and logic.