Kolgomorov Complexity
[todo: explain how computation compresses knowledge without loss in
a way that still allows the brain to compute on the compressed data;
this is understanding; and the depth of understanding is the extent of
the compression; and the only way to form the compressed data is by
performing the computation locally; and the computation has minimum
requirements both for computation time and for memory cached in the most
short term of memories as well as memory cached in the longer term in
which the brain stores such matters as what was recently eaten, in order
that delayed reactions be able to be correlated with earlier actions;
this is an extended present in which the brain stores information
without regard for its emotional valence because the information is
still wide open to receive new emotional valences; in other words it is
emotionally-incomplete information and is stored in a short-term cache
that is separate from other brain memory.]