Quick question,Isnt defender meant to be an appraisal well??...

Quick question,
Isnt defender meant to be an appraisal well?? Does that mean almost a test well and a first for the area and if its not up to expectation it shouldnt be the end of the world as long as we learn for the next drill in the area??

Or does it mean appraisal well as in what ever defender proves to be, then the rest of the acerage is valued as defender??

Sorry to sound stupid but appreciate comments to clarify