Wrong.
"If you are making a general statement and you say that something is the exception that proves the rule, you mean that although it seems to contradict your statement, in most other cases your statement will be true. "
"the presence of an exception applying to a specific case establishes ("proves") that a general rule exists"
You're entire argument is hedging talk. "Pigs could fly, but I don't think it's likely". Or maybe more of a Monty Python skit at this point. Either way, you keep pining for something that has literally never happened.