Skeptics Stack Exchange is filled with questions of the form
Is X true?
For example, "Does Global Warming happen?"
Basically we have a statement. The questioner wants to ask whether the statement is true or not.
I think it makes more sense to simply state:
Rather than asking
Does an apple a day makes you healthy?
We could say
An apple a day makes you healthy?
An apple a day makes you healthy
since our users know that the Skeptics Stack Exchange is there to test statements.