Unsound
Unsound adjective - Not being in agreement with what is true.
Usage example: an unsound and pernicious stereotype
Valid
Valid adjective - According to the rules of logic.
Usage example: your argument isn't valid because you're taking what should be the conclusion and using it as a premise
Nearby Words: validity, validation
Both words in one sentence
- The premises and conclusion can be "true" or "false"; the chain of reasoning itself can be "valid" or "invalid"; the argument as a whole is either "sound" or "unsound".
Source: Sound, Valid, True
Cite this Source
Valid and Unsound. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/unsound/valid
Unsound & Valid. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/unsound/valid>.
Valid or Unsound. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/unsound/valid.
Google Ngram Viewer shows how "unsound" and "valid" have occurred on timeline