All philosophers who study such things as consciousness, folk psychology, and perception are philosophers of mind and psychology. For example, an adjective may appear without a noun or pronoun. All logicians are rational creatures. All fish swim. All fish are swimmers.
All fish are creatures that swim.
Along with a standard form, each type of categorical statement has numerous stylistic variants. In such cases, one must rewrite the variant into the standard form. Every cat is a mammal. Each cat is a mammal. Cats are mammals.