A very different variant of the Extensional approach was proposed by C.D. Broad in Scientific Thought (1923). As we have already seen, Broad subscribed to the Immediacy Thesis: he held that (over short intervals) we experience change with the same phenomenal immediacy as we experience colour or sound. Since change can only be directly apprehended if our consciousness can span a temporal interval, Broad concluded that consciousness can span a temporal interval. Given this commitment, his (1923) a