Determine whether the following argument is valid. If it is valid, what rule of inference is being used? If it is not, what fallacy occurs? Every student has an Internet account. Homer does not have an Internet account. Therefore, Homer is not a student. a. Valid, applying Hypothetical syllogism b. Valid, applying Modus Tollens c. Invalid, fallacy of denying the hypothesis d. Valid, applying Modus Ponens Solution a. Valid, applying Hypothetical syllogism.