The Pharisee thought that Jesus was not a prophet because he allowed the sinful woman to touch him. AT: "Apparently Jesus is not a prophet, because a prophet would know that this woman who is touching him is a sinner"
Simon assumed that a prophet would never allow a sinner to touch him. This part of his assumption can be stated clearly. AT: "that she is a sinner, and he would not allow her to touch him" (See: [[rc://en/ta/man/translate/figs-explicit]])