Many people believe that photographic memory means remembering every detail. But true eidetic memory is extremely rare, especially in adults, and differs from simply good memorization. Only 2-10% of children, but almost no adults, are able to 'see' an image even after it has disappeared. This isn't memorization, but rather visual retention, like a projection on the retina. Test yourself: focus on a detailed but meaningless image, such as a page of Sanskrit text, for exactly 30 seconds. Then look away or close your eyes. Try to 'read' individual symbols or count elements as if the page were still in front of you. If you can do this without simply remembering, but actually 'seeing,' this is a sign of eideticism. Most people, even those with exceptional memories, like mnemonist Alex Mullen, use techniques, not snapshots. Your ability to "see" for a moment is the real key to solving the puzzle in 30 seconds.