👉 The term "substitutionary" is used to describe a method or process by which an object (such as a person, a substance, or a concept) is replaced with another object. The goal of this substitution is often to create a new system that can be manipulated and utilized in different ways. For example, consider the substitution of "water" for "oil" in a chemical reaction. In this scenario, water is considered a substitute for oil because it does not react with oil at all