Take the following as truth: Before 9/11, it was not unheard of for a commercial aircraft to deviate slightly from its course, or for an FAA controller to lose radio contact with a pilot for a short period of time.
Then the following statement: "It wasn't unheard of for a commercial aircraft to change their route a bit, though it is absolutely not allowed today, under any circumstance." is true, false, or inconclusive?
Answer: Inconclusive