Originally Posted by
AllieKat
There's a huge gap between 1% (there would be approximately 3,161,000 terrorists) 0.00000001% (there'd be approximately 0.03161 of a terrorist). The real number is somewhere in that enormous gap.
And I've already admitted it was a rhetorical device, not a precise statistical analysis.
My point, again, is that if more than 99.99%* of American citizens/CostCo customers/MasterCard holders/PTA members/Facebook users are not terrorists, then using citizenship, store membership, credit card status etc is an absurd way to identify who's a terrorist and who isn't.
* Can we agree on >99.99%? Or do you want to argue that there are more than 31,610 people could apply to PreCheck and who are planning to target aircraft from a US airport?
TSA misses about 70% of dangerous things going through checkpoints. If there are even 300 people actively trying to get through checkpoints with evil intent, ~210 of them would succeed.