  Constant structure closed semantic systems are the systems each element of
which receives its definition through the correspondent unchangeable set of
other elements of the system. Discrete time means here that the definitions of
the elements change iteratively and simultaneously based on the "neighbor
portraits" from the previous iteration. I prove that the iterative redefinition
process in such class of systems will quickly degenerate into a series of
pairwise isomorphic states and discuss some directions of further research.
