ASHINGTON — Con- conservative Wscientious that I am, every afternoon I attempt to clear my mind of the day’s claptrap and sprinkle it with a little levity by tuning in to Fox News’ “The Five.” It rarely lets me down. Sometimes I guffaw. Sometimes I merely snicker. All five of the participants have something to say that is refreshingly original, and sometimes one of them provokes thought even from someone so jaded as me. Yet, last week, the Five had an off day.