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It just doesn't add up any way you look at it.
I have no proof, but I'm pretty sure.
It's still only speculation, though.
Given the circumstances, that's most likely.
I'd say it's fifty-fifty.
I can't say for sure, but it's likely.
It's got to be that, obviously.
Call it a gut feeling, but I think it'll work.
It might just be a misunderstanding.
That's not necessarily the case.
I'm all but certain.
I doubt it, but just in case.