3 ms·

You can't prove a negative.

• bandrami 4y ago
  There is no greatest prime number. If there were, call it p, and let q = Π(P), P∈N:P is prime (Eratosthenes showed this is computable) Then q+1 % 1 modulo every lesser prime, meaning q+1 is prime, and p is thus not the greatest prime. There you go. We have just proven a negative.
• mannykannot 4y ago
  In which case, the second paragraph applies.
  • kadoban 4y ago
    But then you might as well just assume everything is compromised, at all times, even if there's been no announcement. They could just not be telling you. Which is maybe not the worst strategy, but it's going to be pretty exhausting. I'd suggest that instead we should just expect and enforce a certain amount of openness and honesty from companies when they fuck up in this way, so we can make informed decisions.
    • mannykannot 4y ago
      Well, yes - this is the dilemma which is not resolved with empty platitudes, even though "you can't prove a negative." In the US and elsewhere, there are already some penalties for covering up a problem, and they should be expanded commensurately with the potential harm.