There's an old joke about the sciences: biology is just applied
chemistry, chemistry is just applied physics, and physics is just
applied maths. It's really a neat little quip about essentialism and
reductionism. While it's true that biology can be accurately described
as "applied chemistry," treating living things as alive – and not as a
set of chemical reactions no different in principle from making a cup of
cocoa or extracting a pigment to use in housepaint – has undeniable
utility.
But we draw boundaries. While there are disciplines that straddle
biology and chemistry and treat organisms as though the most important
thing about them is neither their chemical reactions nor the fact that
they are living, we acknowledge that there are two great poles between
which these gradations shade. There are a lot of things that we can
point to and say, "that's chemistry" and there's a lot of things we can
point to and say, "that's biology".
A computer that causes change:
Is there such a thing as a robot? An excellent paper by Ryan Calo
proposes that there is such a thing as a robot, and that, moreover,
many of the thorniest, most interesting legal problems on our horizon
will involve them.
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