Informed and Invalid

Informed

Informed adjective - Based on sound reasoning or information.
Usage example: the expert's informed opinion persuaded many fence-sitters to get a flu shot

Invalid is an antonym for informed.

Invalid

Invalid adjective - Not using or following good reasoning.
Usage example: an argument which has one untrue premise is invalid

Informed is an antonym for invalid.

Cite this Source
Invalid and Informed. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/informed/invalid
Informed & Invalid. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/informed/invalid>.
Invalid or Informed. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/informed/invalid.
Google Ngram Viewer shows how "informed" and "invalid" have occurred on timeline