Circular argument

A circular argument was an argument that essentially said, "a is true because it's true".

In 2374, when Benjamin Sisko criticized Luther Sloan's suspicions of treason on the part of Julian Bashir, saying that his evidence was circumstantial and speculative. Sloan countered by saying, "What other kind of case can I make against a man who covers his tracks so well?" Sisko then retorted that Sloan was making a circular argument and he knew it. (DS9: "Inquisition")

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