myth
noun
noun: myth; plural noun: myths
1.
a traditional story, especially one concerning the early history of a people or explaining some natural or social phenomenon, and typically involving supernatural beings or events.
myth
noun: myth; plural noun: myths
1.
a traditional story, especially one concerning the early history of a people or explaining some natural or social phenomenon, and typically involving supernatural beings or events.
traditional stories or legends collectively.
"the heroes of Greek myth"...
myth
miTH/folk tale, folk story, legend, tale, story, fable, saga, mythos, lore, folklore, mythology
"ancient Greek myths"
traditional stories or legends collectively.
"the heroes of Greek myth"
2.
a widely held but false belief or idea.
sorry, but there is no reliable documentation that Jesus existed, but I agree that there are more interesting questions.
As for the 20% being reliably attributed to him - actually that would be about zero % because there were no scribes following him around writing things down in Greek, rather...
sorry, but the contemporaries of Jesus were Aramaic speaking Hebrews who were illiterate fishermen and farmers, the Gospels were written by highly literate Greeks decades after the alleged events. None of the gospels claim to be written by eyewitnesses and are written in the 3rd person.