models.]  The cell, of course, does not &quot;solve&quot;
    the problem but has avoided it by harnessing energy-based
    physical laws to do the folding using the DNA symbol
    sequences as the harness.

And planets avoid the problem of learning differential equations
by simply going about their orbital business.  Sadly, the job of
the physicist is not thereby reduced to pointing the planet and
saying &quot;I don't know what it is -- but there it goes again&quot;.

HP: Now perhaps you can see some simil