First, you don't have the authority to determine the meaning of Scripture.Sixth, if you knew Greek and Aramaic (and understood the principles of exegesis), you would see that the rock in Matt 16:18 is definitely Peter.
Please correct me if I'm wrong but isn't exegesis basically someone's interpretation of Scripture. An exegete interprets the not so cut and dry areas of the Bible.
Exegesis and interpretation are not the same. Exegesis is the first step in interpretation. Exegesis requires using all the tools of linguistic analysis to determine precisely what is being said in some particular instance of communication. Interpretation takes the product of exegesis and fits this into the larger framework of the author's message, to get to the author's meaning.
-A8