C'est pas faux is one of the signature catchphrases of Perceval, played by Franck Pitiot, in the French comedy series Kaamelott, where the naive knight often responds to obvious or absurd statements with deadpan logic. The line comes from the show's first season and quickly entered everyday French speech before spreading through clips, memes and reaction videos shared online. Its staying power comes from its versatility: it can sound sincere, ironic or gently mocking depending on the context, so creators keep reaching for it whenever a scene needs a short, knowing reply.