def c4.b

bend-kit-collections@0.1.4.1 · PROOF.bend:92

import Base
import bend-mathlib@0.7.4.0/bool.bend as MBool

92def c4.b(
93  +a: Bool, +b: Bool, +c: Bool, +d: Bool,
94  e: {Bool.and(Bool.and(Bool.and(a, b), c), d) == True{} : Bool}
95) -> {b == True{} : Bool}:
96  MBool.eq_true_of_and_right(a, b, MBool.eq_true_of_and_left(Bool.and(a, b), c, MBool.eq_true_of_and_left(Bool.and(Bool.and(a, b), c), d, e)))