The scientific confirmation is astounding, and has been proven immeasurable times on an extensive array of subjects, many who have diverse mental challenges themselves. These successful presentations of support for a photogenic memory have been documented on normal people with even more success. Not everyone will be blessed with such a memory, (if the condition is always to be considered a blessing), but to assert that the phenomenon does not exist, would be to refute medically acknowledged research evidence.
It has been proven that people learn different than one another. I think that this is support enough that our minds work different from one another. One person can be shown a list of 5 items and forget 5 seconds later and another can remember it 5 years later. Information is stored in there somewhere-unfortunately we don't all have the means to access everything.
I firmly believe that there is indeed such a thing as a photographic memory. I do recall seeing a nice video online about a slightly autistic man who could watch a video of a plane flying over a city, and then could draw the same city from that very limited glimpse.
Yes, there is such thing as a photographic memory. I think that the extent of a person's photographic memory can vary, though. Some can remember every single thing they've every seen. My aunt has, somewhat, of a photographic memory, where, for instance, if she studies information for an exam, she remembers it all.