ratiocinate

• We do not ratiocinate, we run. —  Woman and Womanhood A Search for Principles
• You men theorize, ratiocinate, declaim, dogmatize about abstract propositions, and finally get your feet tangled and stumble over facts right under your noses, that women would never fail to pick up and put aside. —  Infelice
• If one is struck by the magnificence of the great towns of the Continent, one should ratiocinate, and conclude that a major characteristic of the great towns of England is their shabby and higgledy-piggledy slovenliness. —  The Author's Craft
• The Cobbler put the forefinger of the right hand on the forefinger of the left; it is the gesture of a man about to ratiocinate or demonstrate, as —  What Will He Do with It? — Volume 01
• The Cobbler put the forefinger of the right hand on the forefinger of the left; it is the gesture of a man about to ratiocinate or demonstrate, as Quintilian, in his remarks on the oratory of fingers, probably observes; or if he has failed to do so, it is a blot in his essay. —  What Will He Do with It? — Complete

Roget's II: The New Thesaurus

Allen's Synonyms and Antonyms