Each discipline adapts its use of critical thinking concepts and principles. Other aspects grew out of basic concepts or ideas. One of the most common Yoruba traditional religious concepts has been the concept of Orisa. Categories represent abstractions of other mathematical concepts. A set of fundamental design concepts has evolved. There are many different examples of these concepts. This can lead to marketing concepts and ideas. A mathematical model is a description of a system using mathematical concepts and language. He used the game of throwing dice to understand the basic concepts of probability. Extensions of these concepts include logical spreadsheets. This is followed by drawing pictorial representations of mathematical concepts. See the discussion below of Lie subgroups in the section on basic concepts. The matrix shown below attempts to illustrate the relationship among some of these concepts. This research usually focuses on particular sets of strategies known as "solution concepts" or "equilibria". Metaphysical stage refers to explanation by impersonal abstract concepts.