cogency

But Hamas says, with some cogency, that it has been illegal for Mr Abbas to retain his post as the PA’s president since January this year, when his four-year term should have run out.

而哈马斯认为一月以后，鉴于阿巴斯的四年任期已到，若继续保持在巴权力机构的职位应被视为违法，这个看法还是比较中肯的。