 For example, (D10) tells us that d is not exactly located at r3, for the reason that r3 overlaps certain regions (e.g., r1) at which d is not weakly located. In other words, r3 ‘overlaps regions it shouldn't’. The situation with r5 is reversed. (D10) tells us that d is not exactly located at r5, for the reason that there are regions at which d is weakly located (e.g., r2) that r5 does not overlap. In other words, r5 ‘fails to overlap regions it should’. Region r2 has both vices: it overlaps certain regions it shouldn't (e.g., its southeast corner), and it fails to overlap certain regions it should (e.g., r5). Region r4 has neither vice. Hence d counts as being exactly located at it, according to (D10).