Snapshot: 'Doomsday vault' opens

doomsday around the corner ? ”

We make corrections on the paper by González-D ´ iaz [Phys. Lett. B 586 (2004) 1] where the false illustration of Eq. (10) for the case of β = 0.5 (relevant to Fig. 1 (II) therein is pointed out and illustrated.

Doomsday Book, Vol. II

For humans, power is in part control over their lives. History is a collection of past experiences that empower informed actions. A repertoire is the catalog of your things. A large diverse repertoire can be critical or it can be irrelevant. A great hammer is nice if the job involves a nail. You might have lots of wrenches, but not the one that bends the right way for the “tough nut”. The wrong...

Notes on "doomsday models".

I would like to state, briefly and bluntly, why I think the various "Doomsday Models" are worthless as science and as guides to public policy. I hope it will not be deduced that I believe the problems of population control, environmental degradation, and resource exhaustion to be unimportant, or that I think an adequate response to them is a vague confidence that something will turn up. They ar...

Observational Bounds on Cosmic Doomsday

Causality and the Doomsday Argument

Using the Autodialer thought experiment, we show that the Self-Sampling Assumption (SSA) is too general, and propose a revision to the assumption that limits its applicability to causally-independent observers. Under the revised assumption, the Doomsday Argument fails, and the paradoxes associated with the standard SSA are dispelled. We also consider the effects of the revised sampling assumpti...