I'm not going to step into the middle of MJ's and Martee's Showdown At The LBG Corral (see below in the Physics Topic), but I thought now might be an interesting time for the following tidbit.
As has been mentioned in prior posts, Homer Kelley learned a great deal about the Golf Stroke from studying the photographs in two books of his time, Sam Snead's How I Play Golf and Ben Hogan's Power Golf. He particularly liked Hogan's book because "the photographs were large and I could really see what was going on."
That said, he had little regard for the text because he quickly found that it did not reflect the reality of the photos. A case in point was Hogan's assertion that he gained Power by pushing off his Right Foot in the Downstroke. Homer agreed that the move did indeed increase his Power, but not because of the 'pushing off.' Instead, it was because...