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Optical Illusions

Can you always trust your senses?

Perpetually ascending staircase.
How can the man go up all the time
and come back to the same place over and over?

The red squares are the same color

in the upper part and in the lower part of the "X"

The diagonal lines are parallel.

There are no gray spots
at the corners of the squares.

The rows of black and white squares
are all parallel.

Impossible Triangle.

Parallel lines
at sunrise.

The center circles
are both the same size.

The Vertical lines
are both the same length.

Three-Prong Fork.

Ambiguous Cubes

There are only white circles
at the intersections

All the bumps are identical
The one in the lower right corner is upside-down,
The image to the right is rotating.

Wavy Squares? No!
The background of concentric circles makes the squares appear distorted.

Rotating Wheels
The circles appear to rotate when you move your head closer and further away from the screen while looking at the dot in the center.

Warped Square?
There are no curved lines in this figure.

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