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"design" of a brain.  Like many successful ventures in the field of artificial
intelligence, we find that blatantly ripping off natural designs has allowed us
to solve many problems that otherwise might prove intractable.  Fortunately,
Mother Nature has not chosen to apply for patents.

Our brains are comprised of neurons connected to one another by axons.  The
axon makes the actual connection to a neuron via a synapse.  When neurons
receive information, they process it and feed this information to other neurons
who in turn process the information and send it further until eventually
commands are sent to various parts of the body and muscles twitch, emotions are
felt and we start eyeing our neighbor's popcorn in the movie theater, wondering
if they'll notice if we snatch some while they're watching the movie.

=head2 A simple example of a neuron

Now that you have a solid biology background (uh, no), how does this work when
we're trying to simulate a neural network?  The simplest part of the network is
the neuron (also known as a node or, sometimes, a neurode).  A we might think
of a neuron as follows (OK, so I won't make a living as an ASCII artist):

Input neurons   Synapses   Neuron   Output