apply Exists.intro [1]
case h.h.mpr
α : Type
inst✝ : DecidableEq α
p q : ℕ
a1 : p = 0 ∧ q = 1
⊢ ∃ stop_state_list, (p = 0 ∧ stop_state_list = [1]) ∧ q ∈ stop_state_list
case h.h.mpr
α : Type
inst✝ : DecidableEq α
p q : ℕ
a1 : p = 0 ∧ q = 1
⊢ (p = 0 ∧ [1] = [1]) ∧ q ∈ [1]