ad ignorantiam

adverb (or adjective)

ad ig·​no·​ran·​ti·​am

¦ad-ˌig-nə-ˈran-shē-ˌam

: by use of unanswerable challenge to disprove rather than by serious attempt to prove

an ad ignorantiam argument

Word History

Etymology

Latin, to ignorance

First Known Use

1758, in the meaning defined above

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