Goal:
  
  A : Type
  f : A -> bool
  g : A -> bool
  a : A
  Hf : forall x : A, f x -> g x
  H : is_true (foroptb f (Some a))
  ============================
   (is_true (foroptb g (Some a)))


DEBUG:Going to execute:
case not_locked_false_eq_true; assumption
Level 1: Backtrace:

In environment
A : Type
f, g : A -> bool
a : A
Hf : forall x : A, f x -> g x
H : foroptb f (Some a)
Unable to unify "true" with "foroptb g (Some a)".
Level 0: Backtrace:

In environment
A : Type
f, g : A -> bool
a : A
Hf : forall x : A, f x -> g x
H : foroptb f (Some a)
Unable to unify "true" with "foroptb g (Some a)".
Level 0: Backtrace:

No applicable tactic.
Level 0: Backtrace:

No applicable tactic.