Logic that is Illogical The psychology of argumentation and public speaking is filled with clever tricks. One that you'll often see is the setting up of a false choice between two possibilities. In philosophical logic this is expressed by saying: "Either A or not-A, you can't have both." For example, a person is either pregnant or not. Nobody can be a "little bit pregnant." But sometimes, the answer to a question is not yes or no, left or right, or a similar clear choice. "You're with us or you're against us!" shouts the politician. But why can't I be with you on some things and against you on others? A modern presentation of this is the approach of some politicians who say, "Either