How AI slop undermines our understanding of reality

The "how will we know if it's real" question has the same answer as it always has. Check if the source is reputable and find multiple reputable sources to see if they agree.

"Is there a photo of the thing" has never been a particularly great way of judging whether something is accurately described in the news. This is just people finding out something they should have already known.

If the concern is over the verifiability of the photos themselves, there are technical solutions that can be used for that problem.