I'm going to say no, he didn't know. But I don't think I can properly articulate why which just get me into trouble with an even more nuanced variant of that question.
Consider a woman whose child is suffering from a disease. She has gone to all the doctors she was recommended and found no success. She is told to visit Church and pray to Jesus. After the sunday mass, she tells her story to few random church goers. They immediately recognize the medical condition and tell her to visit a particular doctor. Doctor sees her child and provides medication. Her child is cured after few years. Now the question is did she know going to church would solve her medical problems?
As I see it, there are four quadrants : 2 (action, no action) x 2 (solution, no solution). You can build any story based on outcomes.