The multinomial cell probabilities implied by the latent class transition parameters. This is the single definition of the model; every likelihood, expected-count and goodness-of-fit routine calls it rather than restating the algebra.
Latent classes are named pre-state then post-state over guess (g) and know (k), so `gk` is guess at the pretest and know at the posttest. Knowledge is assumed not to be lost over the process, so the know-to-guess class is identically zero and does not appear.
nodk_cell_probs(gg, gk, kk, g1)numeric vector of length 4, ordered x00, x01, x10, x11
proportion guess -> guess
proportion guess -> know
proportion know -> know
probability a guess is correct (gamma)