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Use "cognoscible" in a sentence
"There are people who give dinners, and who are not cognoscible."
"He wonders why the physiologists of old, having such means of instruction, did not inquire into the secrets of nature: but judiciously concludes, that such questions would probably have been vain; “for, in matters cognoscible, and formed for our disquisition, our industry must be our oracle, and reason our Apollo.”"
"He is not only the first being, but the first and primary known, the primum esse and the primum cognoscible, as he is justly to be reckoned."