In order for Rev to defend his position honestly, any disbelief in your cat on his part would have to be a belief that there is no cat. Now it's up to him to prove it.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'