Originally posted by UCE
The Metamind is a higher mind, of which ours are derived. The noumenon (the physical world in its true form) exists within the metamind. It is supported by the Metamind. This scheme replaces a self-existing self-supporting material reality with information stored in a higher mental realm.
If I understood well the hypothesis you propose is a variant of Kant's 'string':mind-models of 'obective facts'-'objective facts' as perceived by our senses-noumenon [the 'thing in itself'].The noumenon in Kant's perspective is 'objective' in the materialistic sense,not directly connected with our minds,but his proposals could be interpreted in various modes:an ultimate reality as understood by actual materialism,a Platonic 'world of forms' which our minds directly access,a metamind,or simply a computer in who knows what transcedental reality,our world being a sort of virtual reality ['the Matrix hypothesis'].
Even if we reject materialism as we know today it is very difficult to make the difference between 'the metamind' hypothesis [a very old one-hinduism has this proposal from ancient times:we 'live' in the 'mind of God'] and 'the Matrix hypothesis' for example.
Frankly speaking the only way to 'confirm' 'the metamind' hypothesis is to access it directly,indeed if our consciusnessess do belong to that level then we should be able to do that.Generally this is considered as being 'non reliable' subjective 'evidence' by many scientists.But if a majority of perfectly healthy people,in controlled experiments,would report [repeatedly] the same things then we would have a strong,scientific,reason to believe it does exists [of course they must not know each other and moreover they must not know the goal of the experiment].
Unfortunately the 'near death experiences','out of body experiences' and so on are not reliable as they are not generally repetable and moreover they are compatible with explanations in the frame of usual materialism [release of endorfines in the case of NDE and so on].Mysticism also have the same shortcuts moreover its 'picture' of the ultimate reality is one of nondeterministic chaos,anyway not one which imply a [personal] Mind.
Also to confirm the 'Matrix hypothesis' we should be somehow capable to 'get out',a Morpheus and a 'red pill' would be needed...
Do you think that our science would be able to make the difference one day or,as some wise men from all religions have always said,only the moment of death could give us the answer...?
[Edited to add]:To confirm the existence of a metamind is enough what I said above but to have strong reasons to believe also in idealism the subjects involved in experiements should also 'see' directly that our 'reality' is a 'projection' of 'metamind'.