Those sources then have Joseph traveling all over the place for years afterwards doing carpentry, and walking to distant cities to do things like fetch Jesus from the Temple, when he was 102.
Others in the same set of stories having lived to be five and six hundred years old, of course.
So is that the kind of plausible reliability we can also attribute to the official accounts of Mohammed ?
Pretty much. It was forbidden to record any hadiths in Mohammed's lifetime (thats actually from one of the hadiths, ironically) and it was adhered to for a hundred years after. Following that, initial hadiths were simply collected, once people realised how many there were, some attempt at credibility was made by attaching the chain of narration or
isnad. But most were collected between 200 to 400 years after Mohammeds death. They were collected from anyone and everyone, since there was no way of knowing if any particular pronouncement was accurate or not. Many were backed up from various sources, many could not be traced to a reliable source, etc. The accuracy of transmission itself says nothing about the veracity of a hadith.
Muslim scholars have classified various Hadiths. A Hadith can be 'sahih'(sound/authentic), 'hasan sahih' (higher level than sahih but lower than sahih),'hasan'(approved), 'hasan sahih gharib' (hasan in regard to soundness but gharib in regard to chain of transmitters), 'gharib' (uncommon, number of narrators is reduced to one at any stage), 'mutawatir' (continuous), 'mashhur' (well known), 'da'if'(weak), 'mawdu' (forged), 'marsal' (forwarded), 'marfu' (traced directly), 'mudallas' (deceptive), 'shadh' (isolated), 'munkar' (disapproved), 'munqati' (disjoined), 'muttasil' (joined), 'maqtu' (broken), 'mawquf' (suspended), 'matruk' (abandoned), 'mu'aalaq' (one or more consecutive transmitters are omitted), 'mahfudh' (contradictory), 'hadith qudsi' (holy narration).
So why do we keep them around, with all these anomalies?
Historic value:
Wilferd Madelung -
"work with the narrative sources, both those that have been available to historians for a long time and others which have been published recently, made it plain that their wholesale rejection as late fiction is unjustified and that with [not without] a judicious use of them, a much more reliable and accurate portrait of the period can be drawn than has been realized so far."
Most Muslims know this and accord them credibility based on their level of knowledge and education rather than piety.
Bukhari for instance, declared that only about 4000 of his 600,000 collected hadiths was probably accurate. And he is considered to be the most accurate.
Bukhari sounds like quite the quirky fellow himself, from anecdotes surviving about him (about as much credible as his hadiths, presumably)
On one occasion, it is said that he was travelling on a boat and had 500 gold coins with him to get him through his journey. While at sea, one of the people on the boat saw his money, and out of greed, he began screaming "I had 500 gold coins and someone has stolen it". At that moment, Imam Bukhari threw his 500 gold coins in to the ocean. The whole boat was searched and no coins were found. After arriving at their destination, the man asked Imam Bukhari, "what did you do with the money?", he replied, "I threw it in the ocean". Out of shock the man asked why. Imam Bukhari replied, "I am compiling a book of the hadith of the Prophet Muhammed (peace be upon him), I cannot allow anything to damage my reputation and discredit me"