Concretely, we could imagine a model in which the brain automatically explored all ways of composing two concepts in working memory (as a kind of automatic architectural feature), or even did something more elaborate (e.g. explored all possible subsets). In this scenario, it would be very expensive to scale up the size of working memory while retaining the same characteristics, though it wouldn’t be an in principle obstruction.
Concretely, we could imagine a model in which the brain automatically explored all ways of composing two concepts in working memory (as a kind of automatic architectural feature), or even did something more elaborate (e.g. explored all possible subsets). In this scenario, it would be very expensive to scale up the size of working memory while retaining the same characteristics, though it wouldn’t be an in principle obstruction.