Double Rainbows

In a previous post, Carl mentioned the conundrum of whether two people can really see the same rainbow. This is really interesting because the look of rainbows, their "position" and "shape," etc are dependent on the perspective of the viewer. Just what exactly are we looking at when we look at a rainbow? Is the rainbow "just in our heads"? My feeling is that for rainbows, it really is just in one's head because I don't think there is anything substantive and definitive enough (either as a physical object or event or whatever) there for the term 'rainbow' to really "attach" to. Perhaps rainbows are like mirages, etc, only they can induce roughly the same images in different people in the same position at around the same time.

My review of Unrprincipled Virtue

By Nomy Arpaly here.