can't rightly say

(I) can't rightly say

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

(I) can't rightly say.

Rur. I do not know with any certainty. Fred: When do you think we'll get there? Bill: Can't rightly say. Bob: Okay, how does this look to you? Bill: I can't rightly say. I've never seen anything like it before.
See also: rightly, say
References in classic literature ?
"Well, sir, what with the hurry and the crowd of people pushing about, I can't rightly say what the lady looked like.
"Well, I can't rightly say. Windsor must be pretty nigh London, for it's where the king lives," was the answer.
"Not knowin' what your notions o' fun may be, I can't rightly say, young feller.
I can't rightly say that raw milk tastes better than the pasteurized product because I don't remember.
I can't rightly say how many readers heeded my call and logged onto ISW or how much traffic ISW generated in its first month of service.
Can't rightly say. I reckon hit's jes goan depend on how all dis schoolin' turn out en whether dis city ever goan recognize dat we is men too en dat we got our rights jes like de white man has his'n.")
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