Yeah, maybe. Though what if Grandpa Joe is chronically ill with waxing and waning debility. There are lots of folks in that boat. Maybe he was just having a very good week. One of the chief complaints I hear from friends that are so stricken is that when they are having an ok day, and are out doing something important or essential or even fun, they are seen by some dillweed that takes it as proof they are a lazy, shiftless malingerer.