As you know, hundreds of years ago in England, a black swan was a popular symbol for the impossible because no such creature had ever been seen, until black swans were discovered in Australia. The bird now symbolizes, that which seems impossible “But can in fact occur” I like the way one article puts it, “The black swan reminds us that believing something cannot happen is often just a failure of imagination."
There have been a lot of close calls that the general population is not aware of. In order to have zero probability that a nuclear war of some sorts will not happen and affect several countries, including our own, the formula would have to be;
Zero Nuclear weapons = 0 probability of a nuclear bomb being detonated in our country.
But that’s not the case, is it?
Same with guns.