The context is the training of the marshalls. Again what assumption do you think should be made when someone disembarks from a plane while leaving their checked baggage behind.
(I thought I would at least have to make three moves to put you in checkmate, but I didn't expect you to fold)
Unless you are involved in air marshal training (which I'm sure you are not from your absurd posts) you have no basis for inferring any assumptions from their training. I do recall that as the air marshal service expanded, recruiting and training standards were greatly lowered...but somehow I don't think that's where you want to go.
And I've already answered your questions.
So here's one for you: What should we assume about air marshals who lie about a passenger running up and down an airplane aisle, saying, "I have a bomb in my bag."