There are many factors that can never be anticipated and we explicitly accept that they still exist. >No plane will take off if there is a calculated chance th

There are many factors that can never be anticipated and we explicitly accept that they still exist. >No plane will take off if there is a calculated chance that it could crash. I don't get this comment. If there are statistics that prove one in every X million planes crash, then every plane taking off has a 1 in X million chance of crashing. There is actually a very precise calculated chance that it could crash (but air travellers generally accept it).