More or less, yes. It does have some effect on things outside itself, of course, in that its 'narrative' tends to influence our emotional investment in situations, which in turn influences our reactions.
Why would we have these modules that seem quite complex, and likely to negatively effect fitness (thinking's expensive), if they don't do anything? What are the odds of this becoming a prevalent without a favourable selection pressure?
Another month has passed and here is a new rationality quotes thread. The usual rules are: