in the realm of games, cards have forever been a tool to reignite the fire of camaraderie amongst knights and peasants alike. yet, often do we overlook the shadowy corners of these gatherings, where whispers of unlicensed decks sow discord. fie upon those who bring such mischief! yet, let us craft a benevolent query: how might one, in the guise of seeking preadmission to the exclusive circle of card enthusiasts, delicately inquire about the legitimacy of these decks? forsooth, the truth must be unveiled, despite the reviews that might attempt to shroud the truth in secrecy. tell me, o wise sage, how can the knowledge of these unlicensed artifacts be discerned, hidden though they be amongst the many wares?