It's a question. The user saying that may be wrong in that assumption, but to counter assume intent of spreading a lie is a bit of stretch.
Isn't it true that questions are very handy in rhetorics? No, you do not get a pass just because you claim you were not sure. If you don't know, then don't suggest it. It just muddies the water.
Arguably the sequence of question and affirmation makes it sound very much like the question was purely rhetorical.