cannot say for sure; not worth mentioning
Meanings
2 senses · 8 examplesverb
cannot say for sure; unable to specify
neutralUsed when one lacks sufficient knowledge or information to give a clear answer. Often precedes a statement of uncertainty.
I really can't say for sure whose fault this is.
I can't say for sure exactly when he will be back.
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I can't say whether I like it or hate it; the feeling is quite complicated.
If you ask me which movie is the best, I really can't say.
verb
not worth mentioning; nothing to talk about
neutralUsed to dismiss something as irrelevant, unreliable, or insignificant. Often has a slightly negative or dismissive tone.
Those are all hearsay rumors; they can't even be considered evidence.
Such a small favor is nothing worth calling a kindness.
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His article is so logically chaotic; it can't be said to have any academic value.
The reasons you brought up are all untenable and simply not worth discussing.