I should think so/not - Idioms by The Free Dictionary
I should think so/not
I should think not
I would naturally expect that this would not happen or be true. A: "Don't worry, you won't have to pay for the additional service." B: "I should think not, seeing as I never agreed to it in the first place!"
I should think so
I would naturally expect that this would happen or be true. A: "My manager said you can get a refund on the item." B: "I should think so—it arrived broken in two pieces!"
I should think ˈso/ˈnot (also I should think she, etc. ˈis/ˈdoes/ˈdid, etc.) used for emphasis when agreeing that something is right or correct: ‘He didn’t give the waiter a tip.’ ‘I should think not, after such bad service.’ ♢ ‘He finally apologized for what he said.’ ‘I should think so.’ ♢ ‘I’m very angry with my son.’ ‘I should think you are. He’s behaved very badly indeed.’