It’s called speculating, and the actual academic research on this speculation is actually still ongoing, so defunding this proposition as ‘just making stuff up’ is just a negation technique that is intended to prevent further thought about what is factually a very fascinating possibility.

You do know that pretty much all science and technology begins with a tiny pinch of speculation, right? We wouldn’t even have civilization without someone making stuff up.

And both Göbekli Tepe and Narwala Gabarnmang sites are distinct examples of humans, making stuff up.

Really, how boring can you be.