MPEP 2141 actually cites to Arendi, but then quotes the case entirely out of context. This is a worrisome problem that can be found in many parts of the MPEP, which makes the MPEP a useful reference tool to find relevant cases, but as useful as an opponent’s brief when it comes to accurately characterizing the holdings of decisions. For example, MPEP 2141 actually cites Arendi for the proposition that common sense can be used to supply a missing limitation from the prior art in an obviousness rejection. That, however, is the exact opposite proposition for which the case actually stands.
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