It 'ought not' ('to') make any difference. [=(more commonly) it shouldn't make any difference]
Children 'ought not' [='should not'] run near the pool.
If my math is correct, the result 'ought to' be zero.
(..) Why did you make me put that down? No. We need a medical dictionary. Like a patient gets difficult, you quone him. You want some funny material? You ought to come down to where I work. There's a sitcom. You must have quite a time down there. - We got plenty of time. (..)1990 TvShow: Seinfeld Title: The Stakeout Season: 1 Episode 2