This page illustrates that our senses cannot always be trusted. Our mind is the final arbiter of truth.
The diagonal lines are parallel.
Perpetually ascending staircase.
How can the man go up all the time and come back to the same place over and over? Alludes to the works of M.C. Escher
There are no gray spots at the corners of the squares.
The rows of black and white squares are all parallel.
Parallel lines at sunrise.
The vertical lines are both the same length.
There are only white circles at the intersections
Wavy Squares? No!
The background of concentric circles makes the squares appear distorted.
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.
There are no curved lines in this figure.
Be careful when taking a decision based on solely your observations…