ɪf kəntˈeɪnz pˈiː, ˈɛvɹi pˈɔɪnt ɪz ɐn ɐkjˌuːmjʊlˈeɪʃən pˈɔɪnt ʌv wˈaɪ, sˈɪns ðə smˈɔːlɪst nˈeɪbɚhˌʊd ʌv mˈiːts wˈaɪ.  wˈaɪ hɐz nˈoʊ oʊmˈeɪɡəɐkjˌuːmjʊlˈeɪʃən pˈɔɪnt.
If  contains p, every point  is an accumulation point of Y, since  (the smallest neighborhood of ) meets Y.  Y has no ω-accumulation point.