Good question In this case the answer is to look for real world follow through, not just the image or the source If something that big were true, you’d see independent confirmations and second order effects pretty fast when the world doesn’t move that’s usually the strongest signal.

That's a good question. How would you answer that question for this situation?

Scoresby

The unsettling bit is we’re training ourselves to ask “who posted this?” instead of “what can be verified?” That tradeoff might bite hardest during real crises.