Certainly, the explanation being that an event with a discrete probability lying between 0 and 1 will definitely happen if the time horizon over which it can happen has no upper bound. Therefore, the chance of aliens landing on Earth is 1, if I neglect to specify a time constraint. (Making the assumption that #The chances of anything coming from Mars, are a million to one# - as in War of the Worlds. I am unaware of the actual figure - but it is certainly over 0.0 which makes my statement true).
In conclusion - I was backing up my statement that there is no need to be scared of cgnao's constant doom mongering. Of course something bad is going to happen - if you dont specify when, then it is a certainty (which is why he has been saying the same thing for 3 years now),