Since impressions are all that are left and not the exact stimuli, dreams do not resemble the actual waking experience.
sˈɪns ɪmpɹˈɛʃənz ɑːɹ ˈɔːl ðæt ɑːɹ lˈɛft ænd nˌɑːt ðɪ ɛɡzˈækt stˈɪmjʊlˌaɪ, dɹˈiːmz duːnˌɑːt ɹᵻzˈɛmbəl ðɪ ˈæktʃuːəl wˈeɪkɪŋ ɛkspˈiəɹɪəns.