PP201 Chapter Notes - Chapter 3: Syllogism, Middle Term, Obversion
Document Summary
We previously learned that if a statement is false, its contradictory must be true. Immediate inferences- we don"t need any information in addition to what the statement already contains to the inference. Immediate inferences yield equivalent statements that means that they say the same things in different ways. The result of switching the subject and predicate terms in a categorical statement. Only can be performed on particular affirmative (i) statements and on negative universal (e) statements. With the e statement no women are fathers if we switch the subject and predicate terms we get no fathers are women . With the i statement some plants are carnivores if we switch we get some carnivores are plants . If the original statement is true, the converted statement is also true. A and o statements cannot me converted ex. The o statement all dogs are mammals cannot be converted to all mammals are dogs .
