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Use "unusefulness" in a sentence
"Reduction of quality, rework or unusefulness of the workpiece are the consequence."
"But whereas some who deny the imputation of the obedience of Christ unto us for our justification, do insist principally on the second thing mentioned, — namely, the unusefulness of it, — I shall under this part of the charge consider only the arguing of Socinus; which is the whole of what some at present do endeavour to perplex the truth withal."