I have been researching the topic of category theory for a number of years now as I have been interested in this topic in depth as well as the psychology behind it. I feel the more I research I notice that I am not alone in this area and have found a number of books and articles in my area of research that have been very helpful in this area of study.
This site is a good place to start in exploring some of the theories behind category theory.
Another thing I have found is that a lot of people don’t know that there are categories in any of the three major classification systems used to describe the human mind and cognition. The three major systems are the British, American, and Japanese. The British system is used in the United Kingdom, the American system in the U.S. and Japan, and the Japanese system used in Japan.
The British system, for example, has categories for things like “animal” and “inanimate,” “living” and “non-living,” “organic” and “non-organic,” and so on.
The Japanese system, however, uses more categories than the British system. There are more than 100 categories (and over 1,000 sub-categories) in the Japanese system. There are also more than 20 sub-categories. For example, there are categories for animals, plants, minerals, and so on. A single category can have over 100 sub-categories.
The Japanese system is probably more useful in creating categories for things that are difficult to categorize, like cats, dogs, and such. But the British system also has categories for these categories, for example.
As for the categories, there are categories like pets, cars, and so on. There are also categories like musical instruments, and books, and so on. In the British system, there are categories like books, and buildings, and so on. In the Japanese system, there are categories like cars, and dogs, and cats.
I just checked the English and Japanese systems, and there’s no categories for pets, cars, or books. That is because pets, cars, and books are not the same thing. If they were, there would be categories for each. For example, cars can be both cars and engines, but dogs and cats can’t.
I know there are categories in our system, but theres a good reason for them to exist in the first place. They help us organize our ideas and thoughts into categories if we want them to stay organized.
We have some categories that are useful for people that like to work with categories. For example, we have categories for “Babies,” “Children,” “Grown-ups,” “People,” and “Special people” when you search for “person” on the English system. When we search for baby or child, there’s a category for babies and a category for children.