(=> (Immunologically-Competent-Cell ?Self)
(And (Exists (?A)
(And (Strictly-Necessary-To ?Self ?A)
(Immune-Response ?A)))
(Exists (?B) (And (Component ?Self ?B) (Receptor ?B)))
(Exists (?C) (And (Binds-With ?Self ?C) (Antigen ?C)))))