Adjective : a logical inference. ,logical thinking. ,War was the logical consequence of such threats.    From Dictionary.com. 

I didn't see the logicalness in him turning his money in, while his family was starving.    From Wordnik.com.  [CNN Transcript Aug 31, 2006] Reference

Whenever men have been the victims of logicalness they have been wrong.    From Wordnik.com.  [Letters of Franklin K. Lane] Reference

Which ideal simplicity and logicalness has become such a fish-bone stuck in our throats.    From Wordnik.com.  [Fantasia of the Unconscious] Reference

Maria Ivanovna, it was a circle which, for me, had a wholly novel and attractive character of logicalness mingled with simplicity and refinement.    From Wordnik.com.  [Youth] Reference

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.    From Wordnik.com.  [Reminiscences of Tolstoy] Reference

3. Deliberateness, judiciousness, rationality, logicalness, sensibility.    From Wordnik.com.  [Nobody Tell Tyler Cowen, Arnold Kling | EconLog | Library of Economics and Liberty] Reference

Man, early, logicalness of, 246; medicine, 493; prehistoric, whether religious, 12.    From Wordnik.com.  [Introduction to the History of Religions Handbooks on the History of Religions, Volume IV] Reference