That's ridiculous...Why would you trust Matthew and the rest of the boys to give you exactly the words Jesus said to them but wouldn't give Paul the same trust???
It's the same Holy Spirit that inspired both groups to write scripture...One group is no more authoritative than the other...
as much as i hate to do it, iscool is correct. the Church teaches the Holy Spirit is the author of the Scriptures and He used humans to write down the words. therefore, Paul and Matthew are equal in that they both are the word of God.