Exceptions to the above rules occur whenthe subject class is empty. For purposes of this course we assumetraditional existential import, that is, we assume that the subjectclass is not empty. For example, in the claim Allangels are good creatures, we assume that angels exist. However,there is a whole school of logic that no longer accepts existential import,and some of you may have already discovered the controversy in textbooksyou have used in the past. Remember, we assume existential importin this course.
Some wars are hellish.
Some wars are not hellish. All congressmen are money gluttons. No congressmen are gluttons. Some congressmen are not gluttons. All dogs are vicious animals.