Concluding or assuming that a theory is true because of a prediction it makes being observed is invalid.
kəŋklˈuːdɪŋ ɔːɹ ɐsˈuːmɪŋ ðˌæɾə θˈiəɹi ɪz tɹˈuː bɪkˈʌz əvə pɹɪdˈɪkʃən ɪt mˌeɪks bˌiːɪŋ əbzˈɜːvd ɪz ɪnvˈælɪd.