Some inconsistencies in usage here  Please indicate if this is wrong  sira is the life of Muhammad during which the revelation Quran was dictated and during which he spoke the authentic hadith sunnah consists of both hadith and sira example hadith are validated by isnah backing a science of its own hadith are extremely significant as social rules and moral guidance  If this is all so why arent there separate links in this article to sira and sunnah and why doesnt this article list some undisputed hadith  The article on isnah already describes the process and on early Muslim philosophy already describes the significance of this in the Islamic culture of scholarship  So this article should be only about the actual hadith while a sunnah article can be about the use of the sira and hadith in practice today and in history  It wouldnt matter much except there are some redundancies here with isnah