uman way of understanding the world around us but those which
would reward us with the greatest non-redundant gains from being
extended by artificial means.

Second, it seems natural to use a topological metaphor to talk
about the issue of where such extensions are most advantageous.
The &quot;boundary&quot; is any interface or any perimeter of our human
intelligence where human limitations are felt most acutely,
and where growth would most naturally occur if cultivated.
The &quot;interior&quot; is composed