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Get a red marker pen and draw on a piece of flat glass. Wait till the ink dries then look at the reflection of a white light source (a lamp or the sun) in the red dye.

it looks greenish.


In front of me on the table is a filter from a digital camera. it's job was to block infra red light.

If I look at the reflection of the lamp in this filter (using it like a mirror) it is red.

On the other hand, if I look through it, the filter looks green.

So red and green are the same if you look from different points of view.


I could, on the other hand, witter on about qualia and reduce the value of the thread.

Instead I will, as asked, mark the OP down.
It's now back to zero.

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