가정 (Assumption) refers to a belief or statement that is accepted as true without proof. It serves as a starting point for reasoning or argumentation. In various fields, such as mathematics and science, assumptions help simplify complex problems and allow for the development of theories or models. In everyday life, people make assumptions based on their experiences or observations. For example, one might assume that the sun will rise every morning because it has always done so. While assumptions can be useful, they can also lead to misunderstandings if not critically examined or validated.