eli5: How come our eyes immediately think the Scottish flag as white stripes instead of blue triangles? How come this occurs for some images and for others it doesn’t (like the flag of england?)

Question

[Click here to see the flag](https://en.wikipedia.org/wiki/Flag_of_Scotland#/media/File:Flag_of_Scotland.svg)

In: 63

Answer 1

The blue on Scotland’s flag and the white on England’s take up the majority of space so we assume the whole flag are those colours and the white on Scotland’s flag and red on England’s are exactly as we see them which are stripes.

I have no idea what causes us to do this but we’ll always see what makes the most sense.