26. The error connected by that if probability of some events is not
computable, it is believed to be zero

Whereas the principle of precaution would
demand that we attributed to such events 100 percentage
probability. However it would lead to absurd conclusions in the spirit of: the
probability of disembarkation of aliens is unknown tomorrow, therefore we
should prepare for it how if it was equal to 100 percent. In this case it is
possible to use indirect ways of an estimate of probability, for example,
formula of Gott.