 Just as rigidity might have bearing on different grammatical categories, not merely the paradigms to which Kripke applies it, rigidity might also have bearing on different modalities. For example, just as ‘the brightest non-lunar object in the evening sky’ seems to designate Venus with respect to the actual world but not with respect to other possible worlds in which Venus is obscured by some other body like Mars, just so the expression seems to designate Venus with respect to the present time but not with respect to other times at which Venus is obscured by some other body. By contrast, ‘Hesperus’ and ‘Phosphorus’ seem to designate Venus with respect to all times. (For cautions about the analogy, see Gómez-Torrente 2006, p. 249.) Therefore, again, ‘Hesperus = Phosphorus’ seems to be true regardless of the time of utterance; ‘Hesperus = the brightest nonlunar body in the evening sky’, on the other hand, is false when uttered as a passing comet outshines Venus. 