Sparky wrote:
"Next postulate that there are other beings somewhere in the universe."

A postulate?

Please understand that I have no doubt that there are other sentient beings in the universe: It is a very big place.

But from a purely scientific perspective I can give you a huge amount of evidence that would support the proposition that sentient life exists nowhere else. You can not provide a single shred of evidence to the contrary.

So to be intellectually honest, today, there is no more evidence for little green men than there is for large purple (invisible) rhinos. The difference is that intelligent people thing there is value in searching for the green men. No one with an IQ over room temperature seriously expects to send up a probe and find proof that there is a factual basis for the Epic of Gilgamesh.
DA Morgan