Ben Carson appears to have a somewhat complicated relationship with the truth, or at least that is the picture emerging of him as new challenges to the truthfulness of his biography surface.

After Politico checked into Carson’s claim that he had received an offer of a “full scholarship” to West Point, his campaign was forced to concede that he had never actually applied and been granted admission, but the campaign “attempted to recast his previous claims of a full scholarship to the military academy — despite numerous public and written statements to the contrary over the last few decades,” the news outlet reported.

(Politico came under scrutiny itself for the way it initially characterized Carson’s concession.)

On Friday, The Wall Street Journal looked into another episode: “In his 1990 autobiography, ‘Gifted Hands,’ Mr. Carson writes of a Yale psychology professor who told Mr. Carson, then a junior, and the other students in the class — identified by Mr. Carson as Perceptions 301 — that their final exam papers had ‘inadvertently burned,’ requiring all 150 students to retake it. The new exam, Mr. Carson recalled in the book, was much tougher. All the students but Mr. Carson walked out. ‘The professor came toward me. With her was a photographer for the Yale Daily News who paused and snapped my picture,’ Mr. Carson wrote. ‘ “A hoax,” the teacher said. “We wanted to see who was the most honest student in the class.” ’ Mr. Carson wrote that the professor handed him a $10 bill.”

But here is the kicker, according to The Journal: “No photo identifying Mr. Carson as a student ever ran, according to the Yale Daily News archives, and no stories from that era mention a class called Perceptions 301. Yale Librarian Claryn Spies said Friday there was no psychology course by that name or class number during any of Mr. Carson’s years at Yale.”