can't say for sure

(I) can't say for sure

I don't know with certainty. A: "How many people are coming to dinner tonight?" B: "I can't say for sure—my family tends to just show up without responding to invitations."
See also: say, sure

(I) can't say for sure.

Inf. I do not know with any certainty. Tom: When will the next train come through? Jane: I can't say for sure. Bob: How can the driver hit so many potholes? Bill: Can't say for sure. I know he doesn't see too well, though.
See also: say, sure
References in periodicals archive ?
Following Saturday's blaze, Watch Commander Ian Taggart, from Canley fire station, said: "It seems like it was another arson but we can't say for sure.
I can't say for sure, but as a reputable farmer from Matimbei, planting and selling sukuma wiki (kales) and cucumber seemed like the best way to be spared from the January blues.
He says he can't say for sure whether the EU is going to reward this situation yet he hopes such a step will soon be taken.
We can't say for sure that there would be even fewer cases of child maltreatment if hourly pay were that high, but our findings point in that direction," Bullinger noted.
As we can't see the lobes of the brain itself, we can't say for sure how big this dinosaur's brain was," Norman said.
He wrote: "In the case of Renee Zellweger, it may look to a great many people like something more than an elaborate make-up job has taken place, but we can't say for sure.
She came out of the last race well, although I can't say for sure she's improved.
Of course, the study itself didn't actually involve any kissing so we can't say for sure.
I can't say for sure how many pieces of cast iron I have, but I'm sure it's about 100?
In Newcastle's case you simply could not guarantee that Sunderland striker Steven Fletcher was going to get the ball when Coloccini made the foul, therefore you can't say for sure whether it was an obvious goalscoring opportunity.
At this stage we can't say for sure whether Blakey has been abandoned.
But I can't say for sure if the UCC will support these proposals," Youssef said.
Eden Hazard should be fit sooner rather than later, we can't say for sure when, but a week's break is good for us," he told reporters.
When it comes to the white stuff this year, forecasters added: "It's too early to say at the moment if there will be snow, we can't say for sure.
But I think the exam and our own skills are cheapened by listing 24 things we can't say for sure something isn't if the study is a reasonable example of the technique.
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