I believe that the role of first principles is key to the question “Is there human-like form of life in other planets?”
Elon Musk described it best before.
In my opinion first principles basically challenges the “think by analogy” paradigm that humans are so good at. If the universe is so big, there’s probably another earth-like planet out with little green guys.
I believe that’s the case, but most of the argumentation and scientific research sometimes seems one sided.
For once, there’s is one clear reason to think that an humongous big universe is so big that there are a lot of chances of getting another earth-like planet.
But what about the other side? there’s another side of the probabilities equation that people don’t consider. An Earth-like planet is damned hard to replicate, specially when it involves livable conditions for the little green dudes. There are a huge amount of variables that need to happen to make it happen.
Both denominator and numerator on that equation have loads of variables that look like infinite, complexity that is beyond our ability to reason. Which one is “more” infinite than the other is hard to judge and that affects the outcome. But humans are good at analogies and they’ll think about possibilities first.
I’m not arguing if there’s life or not. Probably there is.
I am just led to believe that humans are better at using “infinite possibilities” to reason toward one side of the logic and will not spend the same amount of time using it in the opposite direction. Imagination, curiosity, story-telling makes it easier to do so.
Why we do that is a very interesting aspect of human psyche, IMHO.
My theory: Thinking hard against that is in substantially harder (and un-sexy). I believe that being able to challenge yourself toward thinking on the hard side of things always drives interesting stuff and broadens possibilities.