NatOrder.and5_1: def of bend-kit-collections@0.1.4.1
Import: import bend-kit-collections@0.1.4.1/nat_order.bend as NatOrder
Lines 119-121 of bend-kit-collections@0.1.4.1/nat_order.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-collections@0.1.4.1/nat_order.bend&start_line=119&end_line=121

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

def and5_1(+a: Bool, +b: Bool, +c: Bool, +d: Bool, +f: Bool,
  e: {Bool.and(a, Bool.and(b, Bool.and(c, Bool.and(d, f)))) == True{} : Bool}) -> {a == True{} : Bool}:
  MBool.eq_true_of_and_left(a, Bool.and(b, Bool.and(c, Bool.and(d, f))), e)

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=eq_true_of_and_left