Thursday, October 08, 2015

Word of the day: obversion

The word of the day is obversion:

  1. Logic. a form of inference in which a negative proposition is obtained from an affirmative, or vice versa, as “None of us is immortal” is obtained by obversion from “All of us are mortal.”

"Baillie's book, written for surgeons and anatomists, was the obverse of Vesalius's project: if Vesalius had mapped out 'normal' anatomy, Baillie mapped the body in its diseased, abnormal state."

 - Siddhartha Mukherjee, The Emperor of All Maladies

No comments: