Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Akwai wasu ƙoƙari don samun canjin Lorentz ba tare da ƙaddamar da daidaiton saurin haske ba. Vladimir Ignatowski (1910) misali yayi amfani da wannan manufa (a) ka'idar dangi, (b) daidaito da isotropy na sararin samaniya, da (c) buƙatar musayar ra'ayi. Philipp Frank da Hermann Rothe (1911) sun yi jayayya cewa wannan ƙaddamarwar ba ta cika ba kuma tana buƙatar ƙarin zato. Kimanin nasu ya dogara ne akan zaton cewa: (a) canzawar Lorentz yana samar da rukuni mai layi daya, (b) lokacin canza firam, kawai alamar saurin dangi ya canza, (c) raguwar tsayi ya dogara ne kawai da saurin dangi. Koyaya, a cewar Pauli da Miller irin waɗannan samfuran basu isa ba don gano saurin canzawa a cikin canjin su tare da saurin haske <unk> misali, an tilasta Ignatowski ya nemi mafaka a cikin electrodynamics don haɗa saurin haske. Don haka Pauli da wasu sun yi jayayya cewa ana buƙatar duka abubuwan biyu don samun canjin Lorentz. Duk da haka, har zuwa yau, wasu sun ci gaba da ƙoƙari don samo asali na musamman ba tare da hasken haske ba.  Tambaya: Me ya sa Vladimir ya yi amfani da misalin?
ka'idar dangi, (b) homogeneity da isotropy na sarari, da (c) da ake bukata na reciprocity