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ions of the human body so that he could replicate those proportions in his paintings. It is also more difficult to do this on canvas since the replication would be in two dimensions, and not in three, as is the human body. Leonardo was working on a way to make a two dimensional painting look three dimensional.

Perhaps this last quote referring to the parting of the lips could be used as one way of discerning which works of art were Leonardo's and which were not.

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