exact ⟨_, h1, _, h2, h3⟩
case mp.intro.intro.intro.intro.intro.mk.intro.intro.intro
α : Type
inst✝¹ : DecidableEq α
σ : Type
inst✝ : DecidableEq σ
e : EpsilonNFA α σ
starting_state_list : List σ
stop_state start_state✝ : σ
symbol✝ : α
stop_state_list✝ : List σ
h2 : { start_state := start_state✝, symbol := symbol✝, stop_state_list := stop_state_list✝ } ∈ e.symbol_arrow_list
h1 :
  { start_state := start_state✝, symbol := symbol✝, stop_state_list := stop_state_list✝ }.start_state ∈
    starting_state_list
h3 :
  stop_state ∈ { start_state := start_state✝, symbol := symbol✝, stop_state_list := stop_state_list✝ }.stop_state_list
⊢ ∃ state ∈ starting_state_list,
    ∃ stop_state_list,
      { start_state := state,
            symbol := { start_state := start_state✝, symbol := symbol✝, stop_state_list := stop_state_list✝ }.symbol,
            stop_state_list := stop_state_list } ∈
          e.symbol_arrow_list ∧
        stop_state ∈ stop_state_list
no goals