In the 12th century, what Parisian scholar, the author of Yes and No, utilized logic to examine ecclesiastical doctrine? AP World History Chapter 10 In the 12th century, what Parisian scholar, the author of Yes and No, utilized logic to examine ecclesiastical doctrine? a. Peter Abelard b. William of St. Thierry c. Thomas Aquinas d. William of Ockham e. Jacques Coeur Answer: A Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+