Identify what "this" refers to in context: "The method failed to replicate. This undermines the theory."
QUESTION
Identify the meaning in context of "some critics argue…" when followed by author rebuttal.
QUESTION
Identify the function in context: "Admittedly, the policy is costly, but it is necessary."
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ANSWER
Concession followed by reaffirmation of the main claim. The structure admits a drawback but uses 'but' to override it, emphasizing the claim's overriding importance.