Englishfor English speakers
consistency
Noun
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The quality of being consistent or uniform.
They want their employees to have a high level of consistency in the quality of their customer service.
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How dense or thick a substance is.
Mix it until it has a thick consistency.
The consistency of water is pretty thin.
proof
Noun
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Proof is evidence which shows something is correct.
He has proof that he was not at the crime scene. A witness says that they were somewhere else.
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A proof can show how a theorem is correct.