Rate the following argument fragment on its writing, argument, and language skills:
Evidence: under the electoral college system, voters vote not for president, but for a slate of electors, who in turn elect the president. a dispute over the outcome of an elecoral college vote is possible, it happend in 200 but, its less likely than a dispute over the popular vote. The reason is that the winning candidate's share of the electoral college invariably exceeds his share of the popular vote. The electoral college requires a presidential candidate to have transregional appeal.

Score: 2