To be intelligent, a system has to have goals - it has to be an agent. (I don't think this is controversial).
Is a newborn baby human, or a human of any age who is asleep, intelligent by this definition?
Intelligence is a spectrum, not either/or -- a newborn baby is about as intelligent as some mammals. Although it doesn't have any concious goals, its behaviour (hungry -> cry, nipple -> suck) can be explained in terms of it having the goal of staying alive.
A sleeping person - I didn't actually think of that. What do you think?
Hmm, I feel like I should have made clearer that post is just a high-level summary of what I wrote on my blog. Seriously people, read the full post if you have time, I explain stuff in quite a bit more depth.
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: