Again, you miss Jesus point. He gives 2 commandments as an answer to the question "Which is the greatest commandment." Jesus emphasized that obedience to God and future dealings with man solely involved love, love of God and love of man. Jesus was not just speaking to the Pharisees and the crowds of that time, he was speaking to us. So the question was not just simply answered, it was fully answered.
Isa 55:8 For my thoughts [are] not your thoughts, neither [are] your ways my ways, saith the LORD.
Isa 55:11 So shall my word be that goeth forth out of my mouth: it shall not return unto me void, but it shall accomplish that which I please, and it shall prosper [in the thing] whereto I sent it.
Indeed it was "fully answered". But I went back and re-read A-G's post, and I'm not sure where you two differ in your interpretations.
Indeed, Christ answered the question fully. My point was that He answered more than the attorney asked (as He did with the tax and resurrection questions in the same Chapter.) The part I was focusing on is emphasized below: