“Yes,” he interrupts with a low, irritated grunt. “I really do not. I don’t remember my name, yours, the reason I’m here, or the events that precipitated this moment. Moreover, I couldn’t list a single person I know. In fact, I don’t even remember when I learned the meaning of the words I’m using. What I do know, however, is the definition of amnesia, which is a not uncommon symptom following a blow to the head—”

