De Morgan gave as example of a pseudomath a certain James Smith who claimed persistently to have proved that π is exactly 3+1/8.[1] Of Smith, De Morgan wrote: "He is beyond a doubt the ablest head at unreasoning, and the greatest hand at writing it, of all who have tried in our day to attach their names to an error."[2] The term pseudomath was adopted later by Tobias Dantzig.[11] Dantzig observed: