Etymology

conclusory

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Today it means: Offering a conclusion with seriously deficient support in fact or logic; begging the question. Full definition →

First used 1923
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The story

From the stem of conclusive + -ory; first attested in 1662.

First known use, by meaning

  • from 1923 Offering a conclusion with seriously deficient support in fact or logic; begging the question.
  • from 1662 Serving as or relating to a conclusion; concluding, postfatory.

Etymology from Wiktionary, CC BY-SA 4.0.