Your OP reference to the Copernican Principle, also sounds the warning bells and a 'call-to-arms' to all casually interested amateur astronomers that a key principle of Cosmology is threatened if Earth-life is inferred to not be ubiquitously distributed. I call this game-play.
Who knows ?? Who can I consult with, who knows the 'truth' of this matter ? Paul Wally's 'Neutral' Demon, who is so far incapable of distinguishing life from non-life, and life from moons ?Originally Posted by Colin Robinson
Once again ... same answer .. when it comes to life ... who knows ?Originally Posted by Colin Robinson
Has everything observable on the surface of Earth already been observed ?Originally Posted by Colin Robinson
No way ! The latest predicted estimate of the number of eukaryote species on Earth is ~8.74 million, and only 1.94 million, (22%), have been described/catalogued to date ... all that after 3.2 to 4.4 million years of human evolutionary existence !
With that information, I'd say the above questions are indicative of yet more moot thinking, carrying no meaning.
In fact, an even bigger number of Earth-life species, all share the same life model ... with none displaying evidence of even one single, separate instance of independent emergence. I'd say that's some pretty good evidence that the emergence and subsequent evolution process, is pretty selective ... in spite of the attempted philosophically motivated co-option of the Copernican Principle into the life topic !