Did the writers of the gospel copy from each other or another source?

God amazingly used the humans writing in their languages and cultures to give us his inspired scirptures. He didn't just drop it from the sky or dictate it to Mohammad or show it in a vision to Joe Smith. He used real humans writing about real human interactions and experiences to show how is divine presence has been among them throughout history.

 

You are right, gekko, there is no proof of "Q." The only possible reference to it in all of church history until the 19th century is a brief mention by early church father Papias about the possiblity of a Hebrew Gospel: "Matthew compiled the oracles of the Lord in a Hebrew manner of speech." And that is from a secondary source, the church history of Eusebius, centuries after the fact.

Q didn't exist anywhere until the early 19th century, when it found birth in the diseased minds of an occasional rationalist, liberal theologian. Supporters of Q try to prove its existence by comparing and contrasting the Gospels--in other words, by pure speculation. So why in the world would any Bible-believer want to believe in it?