Put the following syllogisms into standard form , name the mood and figure and determine whether the argument is valid or invalid. Be sure to tell what the letters stand for. Some triple crown winners were sired by Northern Dancer. Secretariat was sired by Northern Dancer. So Secretariat will be a triple crown winner.
All unicorns are one-horned animals.
No unicorns exist because no one-horned animals exist. Communism is not a viable economic system. All viable economic systems must allow free enterprise and communism does not allow such enterprise. Some homosexuals are AIDS victims.