Perhaps it was a Freudian slip?
If lukeprog does not use the word rationality in a post, is it rational? I suppose that depends on what you mean when you say rationality. If by rationality do you mean a lukeprog post that would, if read aloud, produce acoustic vibrations in the air that an intelligent agent would concede as rational, or do you mean the brainstate invoked in an agent while it is deliberately maximizing expected utility?
Video link.
This kind of material is regularly featured on Spencer's blog, too.