It is interesting in some ways. However, it involves speculations on things we have no knowledge of.
The idea involves these filters. The one "behind us" involves the barrier to intelligent life similar to us. There are few examples of brainy animals similar to us. Cetaceans have large brains and clearly their songs contain complex information important to them. It is not clear that this is equivalent to complex thought such as mathematics. The other filter involves post-ET development where such life is limited by either self-extermination or the limits of light speed and the unapproachable scale of putative interstellar flight. I suspect planets with complex life above that of prokaryotic-like life are few in number per galaxy. It is hard to know how even prokaryotic-like life starts. The ribosome is a complex of RNA with polypeptides, and this thing is fairly universal. As yet we are not sure how this came about. So it could be that the life bearing planets are already extremely rare. This would make planets with complex life most likely very rare, and then up the ladder the occurrence of intelligent life exceedingly rare. The occurrence of life might be a case of what is called hard emergence. Soft emergence is something like the emergence of chemistry from the quantum mechanics of atoms. Strong emergence is the occurrence of entirely different principles, where this is not an established scientific concept. This is of course a completely unknown territory. How life emerged is one of the great scientific questions. LC On Saturday, February 3, 2018 at 11:21:00 AM UTC-6, John Clark wrote: > > https://www.youtube.com/watch?v=UjtOGPJ0URM > > > John K Clark > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to everything-list+unsubscr...@googlegroups.com. To post to this group, send email to firstname.lastname@example.org. Visit this group at https://groups.google.com/group/everything-list. For more options, visit https://groups.google.com/d/optout.