Do goals always have to be consciously chosen? When you have simple if-then clauses, such as "if (stimulusOnLips) then StartSuckling()", doesn't that count as goal-fulfilling behavior? Even a sleeping human is pursuing an endless stream of maintenance tasks, in non-conscious pursuance of a goal such as "maintain the body in working order". Does that count?
I can see "goal" being sensibly defined either way, so it may be best not to insist on "must be consciously formulated" for the purposes of this post, then move on.
No, they don't have to be consciously chosen. The classic example of a simple agent is a thermostat (http://en.wikipedia.org/wiki/Intelligent_agent), which has the goal of keeping the room at a constant temperature. (Or you can say "describing the thermostat as having a goal of keeping the temperature constant is a simpler means of predicting its behaviour than describing its inner workings"). Goals are necessary but not sufficient for intelligence.
3rd May 2014: I no longer hold the ideas in this article. IsaacLewis2013 had fallen into something of an affective death spiral around 'evolution' and self-organising systems. That said, I do still hold with my statement at the time that this is 'as one interesting framework for viewing such topics'.
I've recently been reading up on some of the old ideas from cybernetics and self-organisation, in particular Miller's Living Systems theory, and writing up my thoughts on my blog.
My latest article might be of interest to LessWrongers - I write about the relationship between life, purpose, and intelligence.
My thesis is basically: