Modus tollens (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Modus tollens" in English language version.

Last modified: 22:22:09, 19 July 2026 (UTC)

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Sanford, David Hawley (2003). If P, Then Q: Conditionals and the Foundations of Reasoning (2nd ed.). London: Routledge. p. 39. ISBN 978-0-415-28368-7. [Modus] tollens is always an abbreviation for modus tollendo tollens, the mood that by denying denies.