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The clausius statement of the second law denies the possiblity of transferring energy by heat from...

The clausius statement of the second law denies the possiblity of transferring energy by heat from a cooler to a hotter body. I think it true because the statement says that " no process is possible in which the sole result of it would be the transfer of heat from a cooler to a hotter body" However, the textboox solution says otherwise. can somebody explain

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