  Neural theories of consciousness face three difficulties: (1) The selection
problem: how are those neurons which cause consciousness selected, from all the
other neurons which do not? (2) the precision problem: how do neurons hold a
detailed internal model of 3D space, as the origin of our spatial conscious
experience? and (3) the decoding problem: how are the many distorted neural
representations of space in the brain decoded, to give our largely undistorted
conscious experience of space? These problems can all be addressed if the
brains internal model of local 3D space is held not in neurons, but in a wave
excitation (holding a projective transform of Euclidean space), and if the wave
is the source of spatial consciousness. Such a wave has not yet been detected
in the brain, but there are good reasons why it has not been detected; and
there is indirect evidence for a wave, in the mammalian thalamus, and in the
central body of the insect brain. The resulting projective wave theory of
consciousness gives good agreement with the spatial form of our consciousness.
It has a positive Bayesian balance between the complexity of its assumptions
and the data it accounts for; this gives a basis to believe it.
