If an appraiser assumes a condition to be true, with some evidence supporting it but not certain, this is called?

The correct answer is based on the definition of an extraordinary assumption in appraisal practice. When an appraiser operates under an extraordinary assumption, they accept a condition as true without complete certainty, but with some supporting evidence. This approach allows the appraiser to proceed with their analysis while acknowledging the potential uncertainty regarding that condition.

Extraordinary assumptions are often necessary in situations where certain facts cannot be verified or are unknown at the time of the appraisal. By making an extraordinary assumption, the appraiser clearly communicates that while they are basing their conclusions on the assumed condition, it is important for stakeholders to understand that this assumption may not ultimately reflect reality.

Options such as an ordinary presumption, hypothetical condition, or conditional assumption do not accurately capture this nuance. An ordinary presumption typically refers to commonly accepted facts that are generally assumed to be true. A hypothetical condition is a specific scenario considered for analysis purposes that contradicts known facts, while a conditional assumption generally involves stipulations dependent on certain conditions being met. Each of these terms has distinct meanings and applications within the appraisal process that differ from the concept of an extraordinary assumption.