resolution of this question will have profound effects on many of the current views in psychology. Along the same lines, Minsky gave a list of concepts common in computer science which have no analogies in psychology (such as the notions of "garbage collection" and "pure procedure"). I recommend this book as an interesting viewpoint on computer science in general and AI in particular. The experimental results alone are worth reading it for. Hopefully we'll see more studies along these lines in the future. stan shebs ------------------------------ Date: Wed 12 Sep 84 09:58:29-PDT From: Ken Laws Subject: Dreams A letter by Donald A. Windsor in the new CACM (September, p.