Loss of executive function is a common symptom of dementia. It seems entirely plausible to me that a good way to test for that is to ask someone to solve a rela

Loss of executive function is a common symptom of dementia. It seems entirely plausible to me that a good way to test for that is to ask someone to solve a relatively simple problem that they've nonetheless probably never been asked to solve before. Especially one that involves applying some iterative process.