Monday-ish word: ratiocinate

[ersatz-read.livejournal.com]

ratiocinate (răsh′ē-ŏs′ə-nāt′), verb

To reason or argue logically and methodically.

This word came to me from a friend who was reading a book that used the word "out-ratiocinate". I didn't think to ask for the full sentence.

Etymology: Latin, from ratio, reason or calculation

(Apologies for lateness and skipped week(s); the work-life balance is...not, these days.)