Model.

<p>The perception of stimulus <i>S</i> = <i>s</i> produces a fine-grained memory <i>M</i>, and a categorical code <i>c</i> specifying the category in which <i>s</i> fell. We wish to reconstruct the original stimulus <i>S</i> = <i>s</i>, given <i>M</i> and <i>c</i>.</p>