premise: I have got a comprehensive strategy to not only chase down the Al Qaida, wherever it exists -- and we're making progress; three-quarters of Al Qaida leaders have been brought to justice -- but to make sure that countries that harbor terrorists are held to account.
hypothesis: 50% of Al Qaida leaders have escaped justice
reason: It is incorrect because it says that 75% of the leaders have been brought to justice, so 50% couldn't have escaped. No more than 25% could have. The system possibly doesn't translate three-quarters to 75%