wˌɛn ðeɪ ɑːɹ vˈɛɹi nˈuːmɚɹəs, sˌuːpɚɹɪmpəzˈɪʃən mˈeɪ ɡˈɪv ðɪ ɪmpɹˈɛʃən ʌv kˈɑːnfluːənsi, bˌʌt ðɪs dʌznˌɑːt sˈiːm tʊ əkˈɜːɹ ɪn ɹɪˈælᵻɾi.
When they are very numerous, superimposition may give the impression of confluency, but this does not seem to occur in reality.