&gt;&gt; Each hadith is based on two parts, a chain of narrators reporting the hadith (isnad), and the text itself (matn).  Individual hadith are classified by Muslim clerics and jurists as sahih (&quot;authentic&quot;), hasan (&quot;good&quot;) or da&#x27;if (&quot;weak&quot;). However, there is no overall agreement: different groups and different individual scholars may classify a hadith differently.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Hadith" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Hadith</a><p>The result is a very large body of knowledge, on the order of 10k, some accepted as trustworthy and others not.  The Christian tradition has seen various books included or excluded from the bible, with anything not making the cut deemed heretical.  Everything included became sacrosanct and above debate.  The more varied approach applied to hadith spills over into Islamic culture, especially law.  Arguably, current Islamic extremist movements are a fusion of Islamic rules interpreted through a very Christian mindset: in or out, forbidden or not, with little room for debate.  They focus only on the Koran, as Christians historically focused only on the bible.