reason

"I had," said he, "come to an entirely erroneous conclusion which shows, my dear Watson, how dangerous it always is to reason from insufficient data. […] "

Still my spirit was not broken. I indulged the anticipation of escape, and that speedily. It was impossible, I reasoned, that men could be so unjust as to detain me as a slave, when the truth of my case was known.

I reasoned the matter with my friend.

to reason one into a belief; to reason one out of his plan

to reason down a passion

to reason out the causes of the librations of the moon