"I'm having trouble with my memory," he began.
"Just normal aging, but I'll give you a short assessment."
Ten minutes later, Bill had drawn a clock, identified a camel, recited three numbers backwards, remembered five words and completed other similar tasks.
"Perfect score, Bill."
He left the office relieved, no dementia.
Driving home, he mistakenly pressed the accelerator at a stop sign and crashed into a car.