are no cats that are also dogs. This is a universal negative because a cat cannot also be a dog. The third type of categorical proposition is a particular affirmative (I). In this proposition, it is stated that there are some members of the subject that are also in the predicate group (Moore & Parker, 2017). An example would be, “some years are leap years.” This is a particular affirmative because it is saying that not all years are leap years, but some are, meaning that the possibility of a leap year is not completely ignored. The last type of categorical proposition is a particular negative (O). A particular negative is when there are some members of the subject group that are not in the predicate group (Moore & Parker, 2017). An example would be, “some criminals are not killers.” This is a particular negative because not all criminals are killers. It is important to understand categorical logic because they help understand the relationship between two logical arguments. You could apply these lessons in life to make the judgment of true or false. For example, if someone tells you its hailing outside, you could find out if it is true or false by just looking outside and making the determination yourself. If it is in fact hailing, then their proposition is true. An example in professional life would be if a patient says, “the doctor prescribed me this medication, but the pharmacy is saying I do not have any current prescriptions.” You could verify this by checking if there was an order, making it either true or false. Reference: Moore, B.N., & Parker, R. (2017). Critical thinking (12th ed.). Chico, California: McGraw-Hill Education.
You've reached the end of your free preview.
Want to read the whole page?
- Fall '17
- Moore,Brooke Noel
- Logic, Syllogism, Categorical proposition, Moore & Parker, Traditional logic, example of each type of categorical proposition