In Saw 3D it is revealed that Dr. Lawrence Gordon, John's oncologist from the first film, is with John after Saw 1. Since this was the case, why did John kidnap Lynn Denlon (another oncologist doctor) for his operation in Saw 3?
There is seemingly no need to have Lynn Denlon because John's tumor cannot be treated as said in Saw 1 and even Lynn Denlon also said the same in the SAW 3.