[quote=@poog the pig]
<Snipped quote by Muttonhawk>

I feel like there should be a third definition of intelligent thought.

Somewhere in between non-sentient and sentient, there should be a [i]servant[/i] intellect where the creature doesn't exist for itself, or has any type of self-awareness, but rather functions under a god's whim. For example, Toun's Fortress, or the Muses (in a very technical manner.)
[/quote]

I know this is really a nitpick on wording but it becomes a little iffy to put something like that between sentient and non-sentient life categories as if there is a sliding scale. A servant intellect would be a removed category from both, because it is missing categories from both.

For one instance, a sentient creature and a non-sentient creature both have a self-preservation instinct. Cornerstone does not.

Really it's a stretch to say that Cornerstone has any intelligence. It would be like saying a stalagmite has intelligence because it builds upon itself.