p513fig13.43 A conditioned inhibitor does not extinguish because the expectation that was learned of no shock during the learning phase is not disconfirmed during the forgetting phase.<BR>||  Conditioned excitor extinguishes.  1. Learning phase: CS1 light-> Shock; CS1-> Fear(-);. Forgetting phase:  n/a;.  2.  Learning phase: CS1 bell + CS2-> NO shock; CS2-> relief(+); CS2-> no shock;. Forgetting phase:  CS2 bell!-> no forgetting;.  The expectation that "no shock" follows CS2 is NOT disconfirmed!