Therefore, Lincoln is dead. Either we use nuclear power or we reduce our consumption of energy. If we use nuclear power, then we place our lives at great risk. If we reduce our consumption of energy, then we place ourselves under extreme governmental control. So, either we place our lives at great risk or we place ourselves under extreme governmental control.
All mammals are animals.
So, all cats are animals. Some animals are not dogs. So, some animals are not collies. But, you will also notice some differences between these forms. It is the last two forms to which we will now turn our attention.