High Quality Content by WIKIPEDIA articles! In the field of real estate appraisal, extraordinary assumptions and hypothetical conditions are two closely related types of assumptions which are made as predicating conditions of an appraisal problem. Under the Uniform Standards of Professional Appraisal Practice (USPAP), they are two of the assignment conditions on which an appraisal assignment is predicated, the others being general assumptions, laws & regulations, supplemental standards, jurisdictional exceptions, and other conditions affecting scope of work. Making the distinction between the two is important when compiling or reporting appraisals in the United States or other jurisdictions where USPAP is considered the professional standard because USPAP has different specific disclosure requirements for each in an appraisal report and specifies different conditions under which each can be made.