Counting pointing paintings are concerned with pointing, but the pointing is co-descriptive with counting. For this reason, counting pointing paintings are their own key paintings.

Converse paintings are pointing paintings wherein the pointing has become the consequent. For this reason, converse paintings describe themselves, and so they are their own key paintings.

A bump painting is descriptive, but there is no outside object of description. For this reason, bump paintings are not described by key paintings. Color-World key key paintings serve as key paintings for all types of bump paintings.

A key painting describes a painting, and so it is painted with a brush. However, this description is only in terms of painting.

Key key paintings describe something, so they are painted with a brush. However, key key paintings do not describe another painting.