Proof of Christianity

[Esquilax]

Interesting. A person born blind cannot actually see the colors. Is that person reasonably skeptical of the existence of color?

Yes, actually. Without evidence, one really would be justified in being skeptical of things that seem obvious to you or I.

How would you prove the existence of color to such person?

Three boxes, each one a different color, but otherwise identical. Three objects with clear differences to touch so that the blind person could tell the difference. Have the blind person place the objects in the boxes, so that a sighted person can see which box contains which object. With the sighted person out of the room, have the blind person switch the positions of the boxes around without removing or altering the objects.

Since the boxes are different colors, the sighted person will be able to tell which box has which object despite the boxes being outwardly identical in every way except color. Now, the blind person might not know what color is, but we've definitely demonstrated an additional perceptual tool to them.