How can Christians not admit Christianity is all a pile of garbage when ...?

[Abracadabra]

There's at least one explanation beyond "they seem to be convinced that they can do it" that I can think of without trying very hard.

Well, if I was interested in just dismissing them that would be easy enough to do. I'm more interested in finding out if there is anything to it. All I'm saying is that there at exists secular knowledge (i.e. cases of schizophrenia) of why this should be possible for a human brain to do.

So the idea that they might be able to do it "reasonable" even from a pure secular vantage point.

To be perfectly honest, I really couldn't care less what someone is convinced that they can do. Demonstrate it, and I my interest might be piqued. Aaah, but there's the problem.

But that's the issue right there. They could never prove their hallucinations to you, you'd have to experience them for yourself. This would be the kind of thing that only you could prove to yourself via a direct experience.

If they are controlled, they aren't "schizophrenic". There are many causes of hallucinations - and one who is able to control one's hallucinations likely doesn't meet the clinical criteria of dysfunction. On the other hand, if you mean "schizophrenic" as in hallucinations similar to those found in schizophrenics, you can drop the adjective and avoid the confusion. A hallucination is a hallucination.

Well, sure.

I only pointed to "schizophrenia" as secular evidence that such lucid hallucinations are possible to the point where people are convinced that they are having conversations with other beings.

So that part has been established as a "secular truth".

The only question that remains now, is whether this can be done at will mentally using certain psychic procedures. And if so, how convincing are these hallucinations?

I just find it an interesting phenomenon. Worthy of looking into.

Not suggesting that anyone else should necessarily find it interesting. But it certainly has a secular basis via the recognition of schizophrenia. That should bring it within the interest of secular thinkers I would think.