what is concepts?
A concept is an abstract idea representing the type and fundamental characteristics of some set of objects in one's mind. When the mind makes a generalization such as the concept of tree, it extracts similarities from numerous examples; the simplification enables higher-level thinking. Concepts arise as abstractions or generalisations from experience; from the result of a transformation of existing ideas; or from innate properties. A concept is instantiated (reified) by all of its actual or potential instances, whether these are things in the real world or other ideas.