Essayist: Every contract negotiator has been lied to by someone or other, and whoever lies to anyone is practicing deception. But, of course, anyone who has been lied to has also lied to someone or other. If the essayist' s statements are true, which one of the following must also be true? ['Not everyone who lies to someone is practicing deception.', 'Every contract negotiator has practiced deception.', 'Not everyone who practices deception is lying to someone.', 'Whoever lies to anyone is lied to by someone. ST']