[Heartlander]

OK – to what shape(s) would your argument NOT apply?

I just want you to tell me how many shapes are actually circles.

[longshadow]

OK – to what shape(s) would your argument NOT apply?

I just want you to tell me how many shapes are actually circles.

Let me put it this way: all degenerate plane geometric figures (lines, triangles, squares, circles, polygons, etc.), meaning when the linear size = 0, are just a point. But they still technically satisfy the definition for the particular plane geometric figure they started out as, and every other plane geometric figure, as well; hence, when the linear size = 0, they are indistinguishable from one another.