feel certain

I feel certain Goodell understands this, he's just too cowardly to say it.

Hang it, yes; you go to bed with the bees, and I feel certain you are in no hurry to get up in the morning.

"I feel certain it was you who called 'fire,' Grace," said Jessica.

I feel certain, while I am writing, that you will see the propriety of what I say.

We may safely feel certain that the nostrum was not liquid oxygen.

I feel certain, however, that you will not decline the tribute I gladly pay you; but I say no more.