👉 Sufficiency is a concept in mathematics and economics that refers to the condition of having all necessary conditions for an object or entity to exist. In simpler terms, it means that something exists if it satisfies all its requirements and cannot be created without them. For example, if you want to build a house, you need to have at least two things: enough land for construction, and enough materials to build the house itself. If you don't have any of these things, your house will not exist