Top 3 Popular Optical Illusions

Two horizontal lines, illustrated as arrows, form a single column, one on top of the other, with the left sides aligned. The 'arrows' look identical, except for their end tips. The tips of the top arrow point outwards, while the tips of the bottom arrow point are reversed. (Imagine a less-than symbol on its left tip and a greater-than sign on its right tip for the former, while the latter alternatively has a greater-than symbol on its a left tip and a less-than sign on its left tip.) Underneath the caption reads "Which arrow is longer?" While the bottom arrow seems longer, both lines are equal in length.

A square black-and-white illustration features two silhouetted side profiles. On second glance, a shapely white vase is also visible in the center.

I'm not sure if I can describe this one.

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