But even turning over A and 7 may not prove the statement false, depending on what is revealed. For that matter it was not even stipulated that this was the complete card set vice a sampling from a larger pack [not an original observation at this point]. Given the latter possibility, 'might' is all there is to work with. So "A or 7" is correct if one or both of those cards falsifies the statement. The answer does not suggest being committed to selecting a particular card; only that one of them (if any) will be sufficient, despite any undue melodrama, to dispatch the villain.