I have a difficulty with trying to understand which questions would be off-topic on this site. I understand questions have been closed because they were written in a way that would degenerate into endless discussion, but that doesn't limit the what can be discussed here, only how it can be discussed.
Half-jokingly: If my question "Is A X?" is off-topic I can magically make it on-topic by rewriting it as "Has it been proven that A is X?", like you can make any question on-topic for Stack Overflow by writing it as "How to do Y (programmatically)?"
If you have a question about the accuracy of public claims made in the media or elsewhere, if you're interested in the evidence behind what you hear or read, then you are in the right place.
The first part of the sentences seems to be included in the second part of the sentence, leaving us with "If you want to know whether anything you heard or read is true, come to us." That's great, but doesn't that require experts in every field to be able to answer these questions? The Gadgets site was closed because it was impossible to answer questions about any random electronic gadget, most (all?) questions were migrated to the more specialized Apple or Android sites. Won't this also happen with the Skeptics SE site, with the questions going to Physics and other science-related sites? After all, I would think they aren't interested in unproved answers either.
I am not a participant in the Skeptics site (yet?), and I wish you all the best with making it a great place to find good information - I'm just worried that this is a huge task and that it will be impossible to handle the unlimited amount of possible on-scope questions.