det erm in istic ▁processes , ▁i . e . ▁where ▁the ▁outcome ▁may ▁not ▁only ▁depend ▁on ▁the ▁vot ers ' ▁actions ▁but ▁may ▁also ▁involve ▁a ▁part ▁of ▁chance . ▁ ▁Inform al ▁description ▁ ▁Consider ▁some ▁vot ers ▁named ▁, ▁ ▁and ▁, ▁who ▁wish ▁to ▁select ▁an ▁option ▁among ▁four ▁candidates ▁named ▁, ▁, ▁ ▁and ▁. ▁Assume ▁that ▁they ▁use ▁the ▁B ord a ▁count : ▁each ▁vot er ▁communic ates ▁her ▁preference ▁order ▁over ▁the ▁candidates . ▁For ▁each ▁ball ot , ▁ 3 ▁points ▁are ▁assigned ▁to ▁the ▁top ▁candidate , ▁ 2 ▁points ▁to ▁the ▁second ▁candidate , ▁ 1 ▁point ▁to ▁the ▁third ▁one ▁and ▁no ▁point ▁to ▁the ▁last ▁one . ▁Once ▁all ▁ball ots ▁have ▁been ▁counted , ▁the ▁candidate ▁with ▁most ▁points ▁is ▁declared ▁the ▁winner . ▁ ▁Assume ▁that ▁prefer ences ▁are ▁as ▁follows . This ▁notation ▁means ▁that ▁vot er ▁ ▁pre fers ▁, ▁then ▁, ▁ ▁and ▁; ▁vot ers ▁ ▁and ▁ ▁both ▁prefer ▁, ▁then ▁, ▁ ▁and ▁. ▁If ▁the ▁vot ers ▁cast ▁s inc ere ▁ball ots , ▁then ▁the ▁scores ▁are : ▁. ▁Hence , ▁candidate ▁ ▁get ▁elected , ▁with ▁ 7 ▁points . ▁ ▁But ▁vot er ▁ ▁can ▁figure ▁out ▁that ▁another ▁ball ot ▁defend ▁her ▁opinions ▁better . ▁Assume ▁that ▁she ▁mod ifies ▁her ▁ball ot , ▁in ▁order ▁to ▁produce ▁the ▁following ▁situation . V oter ▁ ▁has ▁strateg ically ▁upgrad ed ▁candidate ▁ ▁and ▁down grad ed