[stavrianos]

Systems designed to prevent black swan events need to be evaluated against a higher standard than "there haven't been any since we started". That's not success, it's exactly what we would have expected anyways.

[strictnein]

We would have expected no large scale terrorist attacks in the US from 2001 until now? Absolutely no one expected that.

Is it a black swan event if it was attempted 8 years earlier (WTC 1993, 6 dead, 1000 injured)?