At first glance, a puzzle that asks you to count squares seems almost laughably simple. It feels like a warm-up exercise, something meant for children or for passing a few idle moments while waiting in line. Yet these puzzles have a way of lingering in the mind far longer than expected. The reason is that they quietly test more than your eyesight; they test how you think, how confident you feel in your own perception, and how willing you are to question your first impression. When people encounter a grid filled with overlapping shapes, their brains instinctively look for familiar...
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