According to indexicalism, at any time during the interval t 1 –t 4, Cyrano has to lose all of his properties and gain new ones: he first has the property “having-a-big-nose-at-t 1 ”, then the property “having-a-big-nose-at-t 2 ”, then the property “having-a-big-nose-at-t 3 ”, and so on.