law eq_true_of_and_left
import bend-mathlib@0.8.1.0/bool.bend as Boolimport Base
448# If a and b is true then a is true.
449law eq_true_of_and_left:
450 for a: Bool
451 for -b: Bool
452 for h: {Bool.and(a, b) == True{} : Bool}
453 {a == True{} : Bool}