"There is no greater impediment to the advancement of knowledge than the ambiguity of words"
About this Quote
Reid is writing in the shadow of Locke and Hume, whose projects often hinged on analyzing “ideas,” “impressions,” “substance,” “cause.” Reid admired the ambition but distrusted the method: if key terms shift meaning mid-argument, then philosophy turns into a hall of mirrors. The intent is corrective and moral. He’s saying: clarity is not a stylistic preference; it’s epistemic hygiene. Without it, even sincerity and intelligence amplify error, because the mind will happily mistake a word for a thing.
The subtext cuts two ways. First, it flatters common sense against elite abstraction: ordinary language, used carefully, is closer to reality than technical vocabularies that hide their own instability. Second, it warns that ambiguity is socially powerful. Vague terms let institutions and ideologies smuggle in conclusions under the cover of consensus. People rally around “freedom,” “reason,” “nature,” “progress” - then discover too late they never shared a definition.
Reid’s punch is that the biggest obstacle to knowledge isn’t ignorance. It’s the false confidence produced when everyone thinks they agree because they’re using the same words.
Quote Details
| Topic | Knowledge |
|---|---|
| Source | Help us find the source |
| Cite |
Citation Formats
APA Style (7th ed.)
Reid, Thomas. (2026, January 14). There is no greater impediment to the advancement of knowledge than the ambiguity of words. FixQuotes. https://fixquotes.com/quotes/there-is-no-greater-impediment-to-the-advancement-65265/
Chicago Style
Reid, Thomas. "There is no greater impediment to the advancement of knowledge than the ambiguity of words." FixQuotes. January 14, 2026. https://fixquotes.com/quotes/there-is-no-greater-impediment-to-the-advancement-65265/.
MLA Style (9th ed.)
"There is no greater impediment to the advancement of knowledge than the ambiguity of words." FixQuotes, 14 Jan. 2026, https://fixquotes.com/quotes/there-is-no-greater-impediment-to-the-advancement-65265/. Accessed 13 Feb. 2026.














