This is practically impossible, because if you look carefully both of the hands in the picture are drawing each other. It contradicts itself because it makes you thinking which hand actually started the drawing. It tricks the mind because I believe it shows a cycle, in which each hand will keep on drawing, because none will finish until the other one does. It is also impossible thought that the hands of the drawing are going out of the paper.
2.
This picture is mind teasing, because you can never know for sure which are the legs of the elephant. It is impossible to find the legs. Because if you follow the outline, they will guide you to a space, and if you count you can see up to 9 legs. I think this picture is amazing because every person can interpret it as they wish, and see as many legs as they like. I believe it tries to explain negative spaces, because negative spaces are the gaps from the drawing.
3.
This is a really confusing picture, because the more you look at it the lees you understand it. It starts with a big spiral, which starts to shrink and enters the big one, and then it disappears. I really like this picture, because it shows a cycle like the one of the hands. It never ends and you can keep on looking at it for ever, without ever really understanding it. It contradicts itself, it is big big vs. small.
