The way you feel is no sure thing to go on.
"Will you look in on her sometimes and make sure things are all right?"
It would have been a sure thing to hit them.
I tried to sound as if it was a sure thing.
That does not mean the deal is anything close to a sure thing.
He was supposed to be a sure thing by now.
"And for a while it looked as if they had a sure thing."
I can't tell you the number of sure things that didn't make it.
I say seems because nothing is a sure thing when it comes to this guy.
But it wasn't going to be a sure thing, whatever we did.