My recollection is that they fingerprint you and take your picture at the test center. So he might be able to pull this off if he and his brother look similar or are twins. But why do this. If you do well you get to take it again. If you dont do well you also get to take it again. And if ADEA is on the ball they might catch you from the fingerprints (unless identical twins). The potential advantage is being able to take it without waiting 3 mos. and there by knowing some or all of the questions. But I dont think this guy is the fist one to think of this strategy. Im personally going to have faith in the statisticians at ADEA find this anomaly. I imagine that if caught this persons dental career is over.