Explain why the book's division of paramnesia into distortions of recall and distortions of recognition is clinically useful, rather than simply an academic distinction.

Distortions of recall affect what a person believes happened — the actual content of a memory being altered, invented, or misattributed. Distortions of recognition instead affect the feeling that ordinarily accompanies an experience — a correctly perceived event or person feeling wrongly familiar or wrongly unfamiliar, without necessarily any distortion of the underlying content itself. These are functionally different problems: one concerns the reliability of what is remembered, the other concerns the reliability of the felt sense that normally tells a person whether something is new or already known to them. Asking which of these is actually disturbed, rather than treating 'memory problem' as a single undifferentiated category, is what allows the more specific named patterns within paramnesia — such as déjà vu, false reconnaissance, or Capgras syndrome — to be correctly identified and distinguished from one another.