Hi G,
If, we apply, "scientific method", then, yes, it seems to invalidate the various "realities" you mention, but, it may be helpful to remember that, "scientific method" was developed within, and aimed at, what we call, "the real world", therefore, we can expect that, it's application, will lead to perceptual agreements, about the nature of that "reality",................if, we are all sharing, roughly, the same position of the assemblage point, we can hardly be surprised when, we agree on what we percieve.
In journeys outwith our usual "reality", unless we shift to the same position as others, ( as in, "dreaming together,), we can hardly, expect to percieve the same things. Even if, we do adopt the same position, we may not percieve in the same manner, unless, we also, adopt, ( what DJM calls,), the same degree of uniformity and cohesion, i.e.; we not only, occupy the same position, but also, the same dgree of "fixation".
DJM mentioned that, there are thousands of positions that it is possible to adopt, which, result in the perception of energy generating(i.e.; "real",) worlds, but, if, we are not sharing our chosen position, and degree of fixation, with another, we wo,nt find any validation through agreement.
If, we add to this, the limited nature of human perception/awareness, it is inevitable that, there are so many different accounts, of what people encounter in thier "journeys".
The problem with our perception is, that, it is subjective by nature, and, that, we can only percieve in terms of what we already know, ( hence, the word, re-cognize,), thus, people give form to the "foriegn" energies encountered, in dreaming, according to, thier own personal experiences and expectations.
The only way, that I, can think of, to overcome the limitations of human awareness, would be, to dream together with others, and compare our perceptual details, whilst dreaming, and then, to compare notes on our dreaming, whilst, in the waking world.
If, anyone reads this, who, can dream together with others, at will, then, I can only, suggest that, they try this, and report back.
On reading over this, it seems like, I really know what I'm talking about! Hahaha!
Perhaps, I'll change my name , to "Lujan Matus", or, Lonewolf Nagual, and charge for entry to, online bullshitting workshops!
Comforting, all-inclusive, theories/philosophies, reek of wishful thinking. The human capacity for self-delusion, is well documented. Understanding is very limited. Perception, it seems, is not. The unknown, does not, yield to rationality.