Possibility Theory is a mathematical framework used to handle uncertainty and imprecision in information. It was developed as an alternative to probability theory, focusing on the degree of possibility rather than likelihood. This theory is particularly useful in situations where information is incomplete or vague, allowing for a more flexible representation of uncertain events. In Possibility Theory, each event is assigned a possibility degree, ranging from 0 to 1, indicating how plausible it is. This approach is often applied in fields like artificial intelligence, fuzzy logic, and decision-making, where traditional probability may not adequately capture the nuances of uncertain scenarios.