 The rules correspond to the third of the meanings given to the alphabet. Each one of these questions has, at the same time, species that will be useful to establish the type of answer that is sought or the nature of the question that wishes to be formulated. For example, the first, “Whether?”, has three species, namely doubt, affirmation, and negation. The second, “What?”, has four species: the first defines the subject, the second defines the correlatives, the third asks what a certain thing is in another thing (e.g., “What is the intellect in other things?”), and the fourth asks what a certain thing does or has in another thing (e.g., “What does the intellect have in other things?”).