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Which one of the following, if all of them are true is LEAST helpful in establishing that the conclusion above is properly drawn?

  1. Strengthen X

  2. Weaken Y

  3. Strengthen Y

  4. Weaken X

The correct answer is: Strengthen X

In this question, the task is to identify the statement that is LEAST helpful in establishing the conclusion drawn. The conclusion is already drawn based on certain premises, so we are looking for the statement that contributes the least to that conclusion. Option A, "Strengthen X," would be the least helpful in establishing the conclusion because it would further support the premise X, which is already factored into the conclusion. By strengthening X, it wouldn't add any new information or support to the conclusion drawn based on the existing premises. On the other hand, the other options (B, C, and D) would either weaken a supporting premise or strengthen a conflicting premise, which would directly impact the conclusion drawn. Therefore, in this context, A is the least useful option among the provided choices.