To the jurists of the duchy, these facts presented something of a difficult legal problem, for the two claims stood more or less equally in terms of justification: Charles II, as the great-grandson of Robert II by his elder daughter, had a superior claim to John II in terms of primogeniture; John II, as the grandson of Robert II by his younger daughter, had a superior claim to Charles II in terms of proximity of blood.
Hertsogkonna juristidele esitasid need faktid mõnevõrra keerulise õigusprobleemi, kuna kaks nõudmist olid õiguse mõistes enam-vähem võrdsed: Charles II, kui Robert II lapselapselaps tema vanema tütre kaudu, omas eelisnõuet Jean II esmasünniõiguse järgi; Jean II, kui Robert II lapselaps tema noorema tütre kaudu, omas eelisnõuet Charles II veresuguluse järgi.