Questio quid juris
Questio quid juris is a Latin law term meaning roughly "I question which law [applies]." Its use dates back to the Middle Ages, and Geoffrey Chaucer, in the Prologue to the Canterbury Tales (c. 1390), has his illiterate "Sumnour" (Summoner, a server of legal writs for the ecclesiastical courts) always shout out the phrase when he is drunk:
And whan that he wel dronken hadde the wyn,
Than wolde he speke no word but Latyn.
A fewe termes hadde he, two or thre,
That he had lerned out of som decree-
No wonder is, he herde it al the day,
And eek ye knowen wel how that a jay
Kan clepen "Watte" as wel as kan the pope.
But whoso koude in oother thyng hym grope,
Thanne hadde he spent al his philosophie;
Ay "Questio quid iuris" wolde he crie.