Take the following as truth: About this time the Fasten Seatbelt sign would usually have been turned off and the flight attendants would have begun preparing for cabin service.
Then the following statement: "Around this time 30 minutes after takeoff sign, the fasten seatbelt sign would have been turned off and the flight attendants would have begon cabin service." is true, false, or inconclusive?
Answer: Inconclusive