Hume talks about this contradictory phenomen that may prove that it is impossible for ideas to come fromimpressions. He says that several ideas of color are really different from each other but still similart at the same time. If this is true about different colors then it must be true about different shades of the same color and each shade produces an independent idea. If it is not true it is possible for the different shades of color to resemble a color different from what it should be. Then he uses an example to prove this point: He asked what if a man who could see did not know what the color blue looked like. Hume said that this man is still able to have an idea from his imagination about what this color looks like even though he has never seen it before.
I don't agree with Hum on this because how can someone who has never seen a particular shade of blue know what the color is? He has never seen it before so how can he imagine it?
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