text: "Using the Gospels as negative proof texts is an exercise in complete illogic." 
  
  Jesus did not chose any women to be apostles.
  Therefore, woman cannot be ordained as priests.
  
  Since the Church's prohibition of women priests uses the Gospels as a negative proof, the Church's prohibition, using your own words, "is an exercise in complete illogic."
  
  Or are negative proofs OK when they suit your purposes, but not OK when someone else uses them?