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Use "logicalness" in a sentence
"I didn't see the logicalness in him turning his money in, while his family was starving."
"Maria Ivanovna, it was a circle which, for me, had a wholly novel and attractive character of logicalness mingled with simplicity and refinement."
"He was entirely unaffected in his literary work, and everything that he wrote down to the last days of his life is marked by his characteristic logicalness and force."