surely it isn't? Because we are alive right now - there is something rather than nothing! At least I think I exist because I can see things and interpret things - there is something rather than nothing. Therefore the possibility of life is 1 since it does exist? Therefore it HAS to exist - there is no doubt about it because it has already happened. This also depends on whether on believes in fate - if they do, then the possibility would be 1 because life exists now and so it was going to exist anyway because it was predestined to exist.