sorry
case h.a
α : Type
inst✝¹ : DecidableEq α
σ : Type
inst✝ : DecidableEq σ
N : NFA α σ
cs : List α
⊢ { step := N.eval_one, starting_state := N.starting_state_list,
            accepting_state_list := sorryAx (List (List σ)) }.eval_from
        N.starting_state_list cs ∈
      sorryAx (List (List σ)) ↔
    ∃ s ∈ N.eval_from N.starting_state_list cs, s ∈ N.accepting_state_list
no goals