That doesn't seem like selection bias to me. Can you define how you're using the term? If I say the stock market had the biggest crash since 1929 it's the sam

That doesn't seem like selection bias to me. Can you define how you're using the term? If I say the stock market had the biggest crash since 1929 it's the same thing: a statement of how exceptional the circumstances are. What is your objection to that kind of framing?