Jane supposes that, harper's idea is of no value because there is generally no agreement among musicians about which sound is beter.
Mark also claims that Harper's idea is of no value, the reason being, there has been enought time to adopt his idea, and if the idea was any good, it would have been adopted by now.
Both of them are coming to the same conclusion, but the assumptions are different.
CR Method of reasoning
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Source: Beat The GMAT — Critical Reasoning |














