def c3.i
import bend-kit-collections@0.1.4.1/PROOF.bend as PROOFimport Base
import bend-mathlib@0.7.4.0/bool.bend as MBool
126def c3.i(+a: Bool, +b: Bool, +c: Bool, ea: {a == True{} : Bool}, eb: {b == True{} : Bool}, ec: {c == True{} : Bool})
127 -> {Bool.and(Bool.and(a, b), c) == True{} : Bool}:
128 MBool.and_eq_true(Bool.and(a, b), c, MBool.and_eq_true(a, b, ea, eb), ec)