It seems that I am the sum total of my thoughts. And what I think at any given time is biconditionally dependent on what I am disposed to say at that very time. So when I have nothing to say, I have nothing to think. This entails that, at those times, I cease to be. But this cannot be right. Many times I have nothing to say, but do not thereby vanish. So I must be more than a stock ticker of thoughts.