No, it doesn't. "No strong evidence" would convey the same meaning.
In the same way, "Yes it is" doesn't convey the same meaning as "Yes it is?", because just like the presence or lack of the word "strong" matters, the question mark matters.
If everyone is Humpty Dumpty, useful and accurate communication is not possible.
Yes it is? It's not literally the same, but it conveys the same meaning.