I haven't had any encounter with them yet... but anyway...
What makes people think they are not constructions of our mind, hallucinations,...?
How can you communicate with them? Can you for example give them a large number and 'ask them' to factorize it in prime numbers, which will prove that they are autonomous intelligent entities, and not hallucinations? Or can you perform other tests to prove that they are 'real'?
Prove that your real first! :D Seriously, even if an "entity" did spit out some prime numbers; hell, that knowledge could be mine already simply made manifest....
I don't think it makes ANY difference whether they are hallucinations or real. What is the actually quanititve difference between "reality" and "constructions of the mind"? None that I see.
I mean, am I autonomous? Yes? NO? I think I am, therefore I may be....? BUT: Who will ever confirm for me that I have a place in consensus reality, outside of where Ibelieve myself to reside?
The arguments against the DMT entities in particular as being "fake" are startlingly pointless. In my experience, one can say what they will about DMT and the beings who inhabit its landscape- but on actually seeing and interacting with things that I could only call "machine elves"- small, insectile spherical wasplike things, machinlike in their mechanical humming, who simply drew/eat/vomit/paint reality for me. I have never been more astonished then wen I broke through on DMT, fell into fractals- and opned my eyes to see half my room as pure blackness, with a million billion trillion little "elves" hovering at the edge of the blackness and "sticthing" light and reality into it; incidentlly, they sticthed the 3D representation of my girlfriends head onto her (ie. her actual head).
Its like this- these entities are both autonomous and complete hallucinations at the same time. Kinda like humans. They possess all properties, if you let them. They are born from the DMT smoker, but do not live or die with his/her smoking, but merely shine through for a while. Like god, they are both "out there" and "in here". Symetrical beings of nothingness.