3.25 Plurality-with-elimination (Instant Runoff) violates the monotonicity criterion
- Before:
| No. of voters | 7 | 8 | 10 | 2 |
|---|---|---|---|---|
| 1 | A | B | C | A |
| 2 | B | C | A | C |
| 3 | C | A | B | B |
TV = 27,
Absolute majority = 14.
- B is eliminated.
The winner is C.
- … and after the change (2 voters decide to move C up):
| No. of voters | 7 | 8 | 10 | 2 |
|---|---|---|---|---|
| 1 | A | B | C | C |
| 2 | B | C | A | A |
| 3 | C | A | B | B |
- A is eliminated.
- The winner is B.