Do we ever really do anything without cause. I can't think of a none mad spontaneous act that does not have some payoff for the individual.
This is not what I meanth. I think you're confusing spontineatiy with Auturism.

I'd tend to agree with SD on the point about spontanaity, I don't think any sane human being would do something without cause. They might not know why they're doing it because the reasoning is taking place in the subconcious, but there are still reasons. Well that's my opinion anyway.
Ok, you're deferring the possibility of spontaneous thought to the subconsious rather than the consious. That still leaves the question on whether notions can arise spontaneously in the subconsious or are these notions just the results of proir subconsious computation?

It's a serious point because there needs to be spontineatity in the mind to allow for creativity (let alone free will).

I think the Turing test does require some level of intelligence, although it is a very domain-specific problem so the requirements are limited.
I personnally think that to have intelligence requires the mind in question to know something that cannot be attained by reason or logic. It must be able to make intuitive leaps to grasp concepts that are otherwise out of it's reach. If this could be demonstrated, it would certainly "out think" any program that just happened to fool someone into passing the Turing test.