A word's last three syllables and the chance stress falls on each. Give the syllables weight with the sliders and harden the cue with the categoricity dial: watch the antepenult bar — the proparoxytone — shrink toward nothing as the model grows more decisive.
The proparoxytone's probability as a function of how categorical the cue is. It doesn't drop off a step: it slides, gently, toward zero as the model bets more and more on the majority. In the limit of certainty, the antepenult simply ceases to exist.