No credit card companies are supporters of consumer rights. Therefore, it is false that all credit card companies are supporters of consumer rights.

Question

Quizplus · Accepted Answer

This is a valid statement. It is an example of the E proposition in categorical logic, which claims that "All S is P." In this case, the subject term is "credit card companies," and the predicate term is "supporters of consumer rights." The statement asserts that all members of the subject class are included in the predicate class. If this were not true, the statement would be false. In other words, if there were even one credit card company that did support consumer rights, the statement would be false. However, since it is true that no credit card companies support consumer rights, the statement is true. There is no need to consider other options, such as subcontrary or contrary propositions, since they are not applicable to this statement.

No Credit Card Companies Are Supporters of Consumer Rights