  href="./fundamental-vocab.html#Collection">#$Collection</a>&nbsp;&nbsp;</blockquote>Caveat:
        The following is just a representative sample of the many
        reaction types and physical urges that are contained in the
        entire  current Cyc knowledge base. These concepts are more
        specific than the  ``treeline'' where we decided what concepts
        to release, at this time, but we  felt that readers would
        greatly benefit by seeing at least a few examples of  these
        thi