We show that the domain of the three-valued logic function which depends on three variables, is defined on 14 vectors, and represents the simplest CMOS structure, can be 'compressed' in four ways to 7 vectors, as well as in two ways to 6 vectors so that the partial function obtained in each case together with some function on one variable and constants 0, 1, and 2 forms a functionally complete basis in P3.
