For example: If someone says some science is wrong because it's "pseudoscience" Or if someone says X doesn't exist because X is "magic," or uses any word that implies their conclusion?
So far I've thought of "begging the question" and "rhetorical tautology," and House in an episode of 'House' calls it a "faulty syllogism." Is there a concise fallacy to cite this specific kind of fallacious argument?