The issue is as you would guess a strategic one. If he had answered the question definitively and been correct it wouldn't have aided his case, as it would hav

The issue is as you would guess a strategic one. If he had answered the question definitively and been correct it wouldn't have aided his case, as it would have only reaffirmed what already was his case. If however for any reason he got it wrong, he would be fired and probably never work again. People's brains aren't that reliable. I know the difference between the tablets and I wouldn't stake my whole career on which was which if I was put on the spot. It's just not smart.