For example, if P is the proposition: Socrates is mortal. then the law of excluded middle holds that the logical disjunction: Either Socrates is mortal, or it is not the case that Socrates is mortal.
For example, if P is the proposition: Socrates is mortal. then the law of excluded middle holds that the logical disjunction: Either Socrates is mortal, or it is not the case that Socrates is mortal.