The Holy Spirit does(he was there) and is looking over your shoulder as you type.. ask him..
That's the answer the Mormons all gave me. They tried that same method and claimed that the Holy Spirit had led them to become Mormons.
But as I explained in #14636, The Holy Spirit is leading me to recognize the authority of the Magisterium of the Catholic Church. And the Magisterium of the Catholic Church says that "This is my body" means that upon consecration (by one ordained in succession from the Apostles), the bread actually becomes the Body of Christ, and is not a mere symbol.
-A8