case mp =>
  intro ⟨equiv, mem, active⟩
  rw [Array.any_iff_mem_where]
  refine ⟨_, mem, ?_⟩
  exact Activates.iff_equiv_trigger_activated equiv |>.mp active
net✝ : Network
exec : Executable net✝
a✝ : ReactorId net✝
reaction : Class.Reaction (Path.class a✝)
⊢ Triggers exec reaction →
    Array.any reaction.val.triggers (fun x => Execution.Executable.triggers.activated exec reaction x) 0
        (Array.size reaction.val.triggers) =
      true
no goals