alright man.. even just reading wiki stuff it's clear that nobody really knows who wrote what...
http://en.wikipedia.org/wiki/Q_document"The synoptic problem
Two parallel passages from Matthew and Luke. Identical wording is rendered in red.[3]
Main article: Synoptic problem
The relationships between the three synoptic gospels go beyond mere similarity in viewpoint. The gospels often recount the same stories, usually in the same exact order, sometimes using the same exact words. Some sections are repeated nearly verbatim.
Scholars note that the similarities between Mark, Matthew, and Luke are too great to be accounted for by mere coincidence.[4] Since multiple eyewitnesses reporting the same events will never relate a story using exactly the same word-for-word recounting, scholars and theologians have long assumed that there was some literary relationship between the three synoptic gospels.
The precise nature of the relationships between the gospels of Mark, Matthew, and Luke is known as the Synoptic Problem. The recognition of the question, and attempts to resolve it, date to antiquity. For example, Augustine of Hippo, a 5th-century bishop, tried to explain the relationships between the synoptic gospels by proposing that perhaps Matthew was written first, then Mark was written using Matthew as a source, and finally Luke was written using Matthew and Mark as sources. Although this specific solution has fallen out of favor with modern scholars, it represents one of the earliest and most influential proposed solutions to the synoptic problem.
[edit] Markan priority and the Triple Tradition
Markan priority hypothesizes Mark was used as a source for Matthew and Luke.
Main article: Markan priority
One of the first steps towards the solution of the synoptic problem was to note that Mark appeared to be the earliest of the four canonical gospels.
*****Several lines of evidence suggest that this is so. Mark is the shortest of the gospels – suggesting that the longer gospels took Mark as a source and added additional material to it (as opposed to Mark taking longer gospels but deleting substantial chunks of material). Mark's use of diction and grammar is less sophisticated than that found in Matthew and Luke – suggesting that Matthew and Luke "cleaned up" Mark's wording (as opposed to Mark intentionally "dumbing down" more sophisticated use of language). Mark regularly included Aramaic quotes (translating them into Greek), whereas Matthew and Luke do not********For these reasons and others, most scholars accept that the Gospel of Mark was written first, and the Gospels Matthew and Luke use Mark as a source. If Markan priority is correct, the triple tradition would be explained as those parts of Mark which both Matthew and Luke chose to copy.
[edit] The two-source hypothesis and the double tradition
Main article: Two-source hypothesis
The Gospels of Matthew and Luke were written independently, each using Mark and a second document called "Q" as a source.
Markan priority, while explaining most of the similarities between the three synoptic gospels, is unable to provide a complete solution to the synoptic problem. The Gospels of Matthew and Luke have much material in common. While most of that material appears to have been copied from The Gospel of Mark, some of the material common to Matthew and Luke is not found in Mark.
This material (collectively known as the "double tradition") is often presented in both Matthew and Luke using very similar wording, and often presented in the same order. Since this material is absent from Mark, the use of Mark as a source cannot explain how the same stories, using the same words, came to be found in both Matthew and Luke.
Some scholars therefore suggest that in addition to using Mark as a source, Matthew and Luke may have both had access to some second source, which they both independently used in the creation of their gospels-- hence the name "two-source hypothesis". This hypothetical second source is referred to as Q (from the German "Quelle" meaning "source").
The two source hypothesis is currently the most widely accepted solution to the synoptic problem."
you know what this all boils down to? Again.. there is NO HISTORICAL CONSENSUS as to what the FIRSTHAND INFO about JC was.