[A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] generalization 2nd 3rd actions for generalization hierarchy dynamics in generalization hierarchy:polymorphic event generalization hierarchy:polymorphic signal generalization:multiple multiple generalization |