Which of the following choices is a sound argument?
jane austen is an author. stephen king is an author. therefore, i want to be an author.
all turtles are reptiles. the snake is not a turtle. therefore, the snake is not a reptile.
all teachers wear vests. mr. gonzales does not wear a vest. therefore, mr. gonzales is not a teacher.
immortal human beings live forever. benjamin franklin died. therefore, benjamin franklin is not immortal.