Directions: Select the two answer choices that, when used to complete the sentence, fit the meaning of the sentence as a whole and produce completed sentences that are alike in meaning.

Central to all such “cognitive” approaches is a robust notion of rationality in the ________ of scientific theories or research programs.

(1) This is incorrect as the sentence is focused upon the role of cognitive approaches in rational process. Hence, 'liberation' of sciences is the wrong term in context of the sentence. (2) This is correct as the sentence talks about the role of cognitive approaches and rational process. Rationality demands 'appraisal' of the given information. Also, it has a similar word in 'evaluation'. (3) This is incorrect as the rational & cognitive approaches would seek to validate information. 'Rejection' and 'repudiation' give an unwanted negative tone to the sentence. (4) This is incorrect as the rational & cognitive approaches would seek to validate information. 'Repudiation' and 'rejection' give an unwanted negative tone to the sentence. (5) This is correct as the sentence talks about the role of cognitive approaches and rational process. Rationality demands 'evaluation' of the given information. Also, it has a similar word in 'appraisal'. (6) This is incorrect as the sentence is focused upon the role of cognitive approaches in rational process. Hence, 'salvation' or 'liberation' of sciences is the wrong term in context of the sentence.