PROOF.c4.i: def of bend-kit-collections@0.1.4.1
Import: import bend-kit-collections@0.1.4.1/PROOF.bend as PROOF
Lines 110-114 of bend-kit-collections@0.1.4.1/PROOF.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-collections@0.1.4.1/PROOF.bend&start_line=110&end_line=114

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

def c4.i(
  +a: Bool, +b: Bool, +c: Bool, +d: Bool, ea: {a == True{} : Bool},
  eb: {b == True{} : Bool}, ec: {c == True{} : Bool}, ed: {d == True{} : Bool}
) -> {Bool.and(Bool.and(Bool.and(a, b), c), d) == True{} : Bool}:
  MBool.and_eq_true(Bool.and(Bool.and(a, b), c), d, MBool.and_eq_true(Bool.and(a, b), c, MBool.and_eq_true(a, b, ea, eb), ec), ed)

Uses (3):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=bend-mathlib@0.8.1.0/bool.bend&name=and_eq_true