Space, matter, and time relate to that question.
Where is everybody in location and time? One body could be at a location today that a different body occupied yesterday, the same location but at a different time, and a different body. One body could be at a location today that a different body occupied one million years ago, the same location but at a different time and a different body.
This observation caused me to conclude that the odds favor the notion of other life somewhere in the vastness of all space, matter, and time but the odds that different life forms would cross paths at the same location and in time to recognize each other are not favored.
Pure conjecture. Valid with certain presuppositions...but....we need rock solid foundation of accepted axioms..
Pure conjecture could lead us to idea that we are living in a simulation. How could anyone prove that? All “empiric” evidence that is used could be part of the simulation....net effect....proof that there is no proof...a philosophical dead end...
I always tell the ufo-ers...when the aliens show up... Invite them to dinner at my house...(hopefully I won’t be the main course)
Klaatu Nicktoe Barata y’all...