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srean06/01/20263 repliesview on HN

What would have been your estimated odds, of a plane hitting twin towers out of malice, a day before 9/11 happened.

I agree with your comments more often than not, I empathize with your annoyance, but if you play out the game theoretic consequences there are no non-annoying outcomes. I don't like it but that's how it is.

Low probability events with outsized consequences are very difficult to reason through. One potentially chipped thermal insulation ceramic tile, should we engage reentry or not. What are the odds that the tile did get chipped, what are the consequences if it did.

The only good way to play this is for a country to not act in ways that motivates potential acts of organized terrorism. That would leave only the positively deranged solitary cuckoo brains to deal with.


Replies

godelski06/01/2026

  > What would have been your estimated odds, of a plane hitting twin towers out of malice, a day before 9/11 happened.
Lower than walking outside and finding the winning powerball ticket and getting struck by lightning. It's not an impossible thing to happen but it is so unlikely that I don't go around letting the idea dictate anything about my life. It doesn't matter that I know this has happened to somebody, that's just statistics.

  > Low probability events with outsized consequences are very difficult to reason through.
Are you afraid that a country is going to randomly drop a nuke on you? I bet you aren't. Same with a building bombing. Or a dirty bomb. Or any number of things.

Remember, I didn't say the odds are 0, I said these are extremely black swan events. In fact, there's a lot of more likely ways to die on a plane that are far more likely. If you aren't afraid of those, then your fear is fear, not reality.

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CWuestefeld06/01/2026

I think godelski is being far too permissive in his odds. As he says, we need to examine how (un)likely is it that somebody is trying to execute this terrorist action, including being competent enough to create a workable bomb, to sneak it through security, and so forth. That's all his numbers show.

But we've also got to factor in

A) How likely is it that this bomb is going to have some bluetooth component? It seems like needless complexity, so we should weigh strongly against this. Further, it's less likely that our hypothetical terrorist needs to have expertise in this domain as well.

B) How likely is it that he would clearly paint the word "BOMB" on the side of his device (figuratively, of course, since this is digital)? That's amazing levels of stupidity. And then intersect that with the claim that he's competent in all the other things (bomb making, sneaking through security, making a bluetooth trigger for his bomb) but is so incredibly stupid that he'd label it a bomb.

Factoring all of this in, godelski is being far too generous in assessing this with odds similar to finding the winning Powerball ticket outside the front door while simultaneously being hit by lightning.

I acknowledge that the airline captain has some responsibility for our security. But part of this responsibility is being a steward for our overall well-being. And in this case, the "security" aspect is so vastly overwhelmed by the damage it did to passengers in other ways, that it was obviously a bad call on the captain's part.

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zdp706/01/2026

If you were the FBI, much higher than you are assuming. Read up on https://en.wikipedia.org/wiki/Bojinka_plot . The FBI had the plans for the foiled first attempt for 9/11.