But is this thought? Earlier you said that words were sound, but this isn't true; the word "sound" means something very different from the word, well, "word". For instance, even though I'm using a totally different medium than speech, right now I'm relying upon words to communicate with you. Whether through speech or symbols, I can convey the words, because they represent an idea that I'm trying to convey. In other words, words translate an idea into sound, and allow me to translate via sound or text an idea to you. But it cannot be said that the words themselves are the sounds or text. The syllables "Oh" and "Shen" have no meaning at all in the abstract, but I can connect them to convey the idea of a huge body of water.

What makes electric pulses through the brain any different? Are these thoughts, or are they merely evidence of thoughts? You could describe the physical process by which someone is running, and say that that was why they ran; but it would be more accurate to say that they ran because they chose such an action for whatever reason, and the actual tightening of muscles and sinew and electric pulses to the legs are all simply the process by which this will is carried out.

This is a logical impossibility, funnily enough. It is absolutely impossible to have a completely logical explanation of the Universe (or at any rate, reality). If you don't believe me, try one. It doesn't have to be falsifiable or based on actual observation; simply construct a theory that would hold up internally without any testing where logic holds throughout.