Let me give an optimistic feedback because Reginald's work is well worth it. Reg's essay and his combinator book have had a huge influence on my career and my way of thinking as a programmer. I really recommend everyone here to take a look at the combinator book at http://combinators.info

As to the point of the presentation, it's an interesting view of things. Making a note of my explanations explanations is something I should do. Introspective exercises like this can sometimes lead to surprising discoveries.