Dear Littler: We have an employee who is exhibiting signs of dementia or some other sort of cognitive impairment. He has fallen asleep at work a few times recently and seems confused by tasks that did not pose any problem for him in the past. His performance was solid for years but started declining in the past several months, along with his attention to detail. How do we handle our concerns about his well-being and performance? Should we ask him what’s going on with his health?