In 1904, Reinach obtained his doctorate in philosophy under Lipps with his work Über den Ursachenbegriff im geltenden Strafrecht (On the concept of cause in penal law).
I 1904 fik Reinach sit doktorat i filosofi under Lipps med afhandlingen Über den Ursachenbegriff im geltenden Strafrecht (Om årsagsbegrebet i straffeloven).