Answer:
Extraordinary Assumption
Explanation:
Extraordinary Assumptionn
An assumption, that has a specific assignment, which, if found to be false, could alter the appraiser's opinions or conclusions. Extraordinary assumptions makes a presumption as fact otherwise concluding about physical, legal or economic characterisitcs of the subject property; or about conditions external to the property such as market conditions or trends; or about the integrity of data used in analysis, when the information is uncertain