 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.An assumption is a statement or condition that is presumed or assumed to be true and from which a conclusion can be drawn.USPAP defines an assumption as "that which is taken to be true".