How do we measure consciousness?

This little animation combines two of my favorite things: original Star Trek and a discussion of human consciousness. The results are a bit grim!


  1. I think that I maintain consciousness during sleep, but surgery is another matter. I can't be sure that I am the same person who went under. Perhaps I've been replaced.

  2. And then there's the fact that every seven years or so, all of the cells in your body have replaced themselves. Are you the same person, or a continuation of a lineage?