Let alone
Mutual synonyms
Both terms in one sentence
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He's so thorough in covering up his crimes that it takes roughly half of the series to prove that he even exists, let alone responsible for any murders.
Source: Police Are Useless -
Of course, no one's about to openly admit being directly related to Adolf Hitler, let alone be able to prove it.
Source: Useful Notes / Adolf Hitler - That format could prove irritating if you had a cd player that automatically inserted silence between tracks, let alone if you decided to put the CD on shuffle... But thankfully, the digital versions of Vinyl and Hi-Fi Sci-Fi include "Steve Is Here" and "Hey Grandpa" as single tracks.
Source: Hidden Track
Cite this Source
Prove and Let alone. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/let_alone/prove
Let alone & Prove. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/let_alone/prove>.
Prove or Let alone. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/let_alone/prove.
Google Ngram Viewer shows how "let alone" and "prove" have occurred on timeline