retrieval always falls upon a single phrase. In some cases (such as the baseball example), when given a few possible frames, we can use other phrases (or by default, other words) to finish the disambiguation. What we cannot do is to paste a large number of small clues, each with hundreds or thousands of associations, into a finished whole. This, of course, is exactly what our opening example, the verbose version of George's cherry tree, required.
As we saw in the previous section, however, the model has problems, particularly those surrounding the "baseball" example. These problems are not minor ones, and must not be minimized. Nevertheless, the model arises in a natural way from completely independent consideration. To me, at least, this gives it considerable appeal.
This research was supported in part by the Office of Naval Research under contract N00014-79-C-0592.
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