Translate the following inference to logic notation: For all x, x_8 is not a police officer. For all x, x_8 is a police officer if and only if x_8 will write a letter. Susan is writing a letter if and only if Linda is a server. Therefore Linda is not a server.
forall x: ~P(x). forall x: P(x) <-> Q(x). Q(a) <-> p. Therefore ~p.