Provided, of course, that building more than a single paperclip increases U. This seems to be implied by “The disciple builds a paperclip or two and nothing much else”, though is in contradiction with “utility 1 if it builds at least one”.
Building two paperclips increases the probability that you’ve built one (and haven’t just imagined you built one).
Building two paperclips increases the probability that you’ve built one (and haven’t just imagined you built one).