Able to be known, noticed, or perceived; within the scope of knowledge or awareness.
From Old French connoistre (to know), derived from Latin cognoscere (to know, to become acquainted with). The suffix -able was added to create an adjective meaning 'capable of being known.' This is the British spelling; American English uses 'cognizable.'
Courts use this word constantly—a 'cognisable offense' is one that a court can legally take notice of and prosecute, making it literally about what the law recognizes as real!
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