Once again, one caught sight in the music of the French clarity and orderliness, logicality and conciseness.
He observed, he reasoned, he found explanations; but he did not always discriminate as to the logicality of his reasonings.
early 15c., "based on reason," from logic + -al (1). Meaning "pertaining to logic" is c.1500. Attested from 1860 as "following as a reasonable consequence." Related: Logically.