Did you ever wonder if the “red” you’re seeing is the same as the “red” others see? And how would we ever know? What if suddenly we could see MORE colors – the light spectrum was more visible or discernible to us? Well, most of us right now are assumed to be trichromates, with red, green, and blue cone sensors, but this woman just might be a TETRAchromate with an additional sensor somewhere between red and green. This reminds me of the book Vanishing Point where there are odd probability shifts and suddenly there are paint cans with strange names on them on the shelf, and the characters are too freaked by the thought to even open the cans and look – afraid of what they might see or NOT see.