Two Arrows, One Glass of Water

A card shows two arrows drawn pointing the same way, with a glass of water in front of only the lower one - testing whether a model knows that looking through the water reverses the submerged arrow, without being told.

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A photorealistic photo taken at eye level, the camera level with the middle of a drinking glass, looking straight on at a horizontal line of sight. A white sheet of paper stands upright on a wooden table, propped vertically against a stack of books so it faces the camera directly. On the paper are exactly two small thick black arrows drawn one above the other, both pointing to the left; each arrow is drawn short and compact, clearly narrower than the width of the glass, so the whole arrow including its arrowhead fits comfortably within the glass. On the table, a few inches in front of the paper, stands a large clear wide cylindrical glass filled with water; it is placed directly in front of the lower arrow so that the entire lower arrow, shaft and arrowhead together, sits behind the body of water and is seen through the glass, while the upper arrow is higher up, above the rim of the glass in open air. A dark blue tablecloth, a marker lying on the table, soft even studio lighting.