It's your first day on the job, and you showed up looking a little too casual for the office. Don't you wish you remembered the dress code? Well, if you had an eidetic memory—more commonly known as a photographic memory—you probably wouldn’t have forgotten.

Eidetic memory simply means extremely precise memory. If you've ever wondered if you have one, you're in luck: there is an eidetic memory test making the rounds on the Internet.

The test prompts you to stare at two different images, then combine them. Sounds easy, right? Well, according to neurology professor Barry Gordon from the John Hopkins University School of Medicine, many people who flaunt having exceptional photographic memory don’t actually have it. "Even visual memories that seem to approach the photographic ideal are far from truly photographic,” he wrote in Scientific American.