Einstein (1907b) akakurukura mubvunzo kana, mune zvakasimba miviri, uyewo mune dzimwe nguva dzose, kumhanya mashoko anogona pfuura kumhanya chiedza, uye akatsanangura kuti mashoko aigona ichitumirwa pasi izvi ezvinhu kare, saka causality kwaizova kutyora. Sezvo izvi zvinopesana zvachose pamusoro ose ruzivo, superluminal velocities vanofungidzirwa hazvibviri. Akawedzera kuti munhu simba pamusoro zvakasimba muviri anofanira akasikwa mukati SR. Pakupedzisira, Max Born (1909) panguva basa rake pamusoro-kutaurwa pamusoro kukurumidza kufamba, akaedza kusanganisira pfungwa yakasimba miviri kupinda SR. Zvisinei, Paul Ehrenfest (1909) akaratidza kuti Born kuti pfungwa kutungamirira inonzi Ehrenfest Paradox, umo, nokuda contraction, ari velocity mashoko anogona kupfupiswa apo kutenderera disk rakapfupika, saka causality kwaizova kutyora. Zvisinei, "Kunyange zvazvo pfungwa pamusoro zvakasimba muviri anofanira kusikwa mukati SR, hazvina kushandiswa kurondedzerwa kuti kana ari kinematic musiyano pakati anoona uye chaiye muoni mutariri, asi rinoshandiswawo kuti kurondedzerwa kana kwete kuti kunoshanda kuti muongororo pamusoro
kumhanya kunopfuura kwechiedza