Goal:
    p : nat -> bool  q : nat -> bool  i : nat
  ============================
   ([|| ~~ p i, p i | q i] = true)


DEBUG:Going to execute:
<coq-core.plugins.ssreflect::ssrtclintros@0> arg
DEBUG LTAC Evaluated term: (implybE (p i))
DEBUG LTAC Evaluated term: (implybE (p i))