In some cases it might be bs, and I think there could be a test for that. The idea is from Feynman, of all people, who once discovered that his colleague counts

In some cases it might be bs, and I think there could be a test for that. The idea is from Feynman, of all people, who once discovered that his colleague counts in "visual" numbers while he counted in "auditory", or maybe I mixed them up. The idea is to simultaneously do two tasks that would interfere with each other if they were of the same kind, and would be performed successfully if they are different. So, give a person a text to read out loud and make them perform a cognitive task that requires, in your opinion, verbal reasoning. If they can read and still solve the task in the same time as "normal" people, they could probably reason in non-verbal terms.