On a possible errata corrige ??

In his survey paper , in "Advances in Linear Logic" (Ed.Girard-Lafont-
Regnier), page 24, Girard semplifies the phase semantic for ! as follows:

       !X is the double linear negation of (X intersection I),
       where  "I is the set of idempotents of M which belong to 1".

       This would force uniqueness of !,does it ?
       So one should say that " I is a set of idempotents belonging to 1 and
       closed under product."
       If I am right, then this may remind the latin motto
            Aliquando dormitat et bonus Homerus
 Aldo Ursini,
      Universita' di Siena
      Dipartimento di Matematica
      Via del Capitano 15
53100 Siena - Italy

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email: ursini@unisi.it