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Well all I'm saying is we can't trust our senses. The 'hardware' in our eyes might be accurate to the 16th million shade of color and our optic nerves flawlessly transmit the correct data to our brain but the 'decoding' part of the brain is flawed by too many variables.
To illustrate my point see the picture attached. The straight middle band is a solid color across the whole surface. Even with me telling you that I bet you'll still have a problem believing it because your brain is assessing it in context. So it takes into account other variables which are the gradient in the top and bottom bands as a reference and obviously will compensate so you see a gradient in the middle also.
In the same line of thinking when you read this message your brain register patterns. It doesn't analyse words letters at a time.
If there is such a strong discrepancy between what our eyes see and what our brain 'sees' who's to say the same doesn't happen with our other senses and can't be exploited?
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