the theory is built too quickly and I fear it uses conceptual constructs that involve more rational engagement than is possible while under the influence.
categorization is largely dismantled as is discrimination of what is me and what is not me...
anything that can be sensed
is me regardless of how it is sensed.
i.e. if it is in mind it is me.
This is not like believing that you have become a lamp. instead you are also the lamp that is an image in your mind, and you can sense how it feels because the mind can project sense markers that are normally proprioceptive into the synesthesiac experience that includes the image of lamp.
note: while being the lamp, one is fascinated or shocked but not defensive as a lamp, One feels generally disrupted but not only as a lamp. the lamp perception has become merged into the moment of experiencing and experiencing is you.
The mistake here, I think, is that the assume that the way we divide objects into groups based on sets of properties remains unchanged and that the belief that you've become a lamp or that a lamp is a living being is simply placing lamp in the wrong category of objects, from inanimate non-thinking things to animated thinking things.
I believe that categorization is disabled at this point, the rush and resonance (resulting from slowed fading of several moments of sensation and mental contents overlapping) of mental contents is flooding out perception (memory recall) which extends from mere recognition through naming and later on categorization - categorization is not the first edge of perception.
...It's hard to understand how someone could make such an error while retaining the rest of their mental categorization scheme which is why I think these experiences are so striking, they seem unimaginable because of the sheer cognitive dissonance that would be required. However, if the way you divide and categorize things based on their properties is completely shifted then there is no reason to believe that a tire can't be conscious because the system of categories that you have built up over your entire life (dogs, chickens, and cows are all animals, animals posses some degree of agency and can be unpredictable etc etc.) is either weakened substantially or vanishes entirely meaning that kinds of objects are can no longer be divided by these properties. In our everyday life we have a mental inventory of the kinds of objects that posses agency and kinds of objects that do not, agency is used as a fundamental attribute to divide the things around us into groups of kinds of objects. What I argue is that many intense drug experience obliterate our sober categorization schemes meaning that objects which we would normally group together now have no attributes to distinguish them. I don't believe the lamp is alive so much that the division of objects into living and non-living things no longer makes sense to me.
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yes those categories are largely unavailable (but not obliterated) yet it is much more general effect: all associative cognition is reduced while sensory overlap and chaotic resonance fills the brain.
Salvia and High-Dose dissociatives have the capability to make you identify with a non-thinking thing, in order to do this you must first believe that the inanimate object is capable of conscious experience, again this may be the failure of our everyday categorization scheme that separates conscious things from non-conscious things. When these categorical boundaries become fuzzy then a little ego dissolution could easily make you identify with something that, in our everyday experience we know (believe?) does not posses the necessary attributes to experience anything. It's not that you forget that this one object isn't alive but that the alive/non-alive distinction ceases to mean anything.
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in order to do this, you do not need to believe anything at all. it is basic, and just because it is basic your reflex is to attribute it to death. I think that is a wrong approach, and you need a more basic understanding of brain and mind to formulate a cohesive theory here.