expected

Loading higher-order.disco...
Running tests...
  pand: OK
  por: OK
Loaded.
  - Test passed: ∀x. por(x =!= 0, ∃n. n * x >= 1)
    Checked 100 possibilities without finding a counterexample.
  - Test passed: ∀f. any([∀x. f(x) =!= not x, ∀x. f(x) =!= x, ∀x. f(x) =!= false, ∀x. f(x) =!= true])
    No counterexamples exist.
  - Test is false: all([true, true, true, false, true])
    Counterexample:
      and_side = right(■)
      and_side = right(■)
      and_side = right(■)
      and_side = left(■)
  - Test passed: ∃k. hasFactors(2 ^ k + 1)
    Found example:
      k = 3
      n = 3