I actually don't know the legality of inheritance in George R.R. Martin's world.
The quote humorously highlights the intricate and often brutal heirship customs depicted in George R.R. Martin's fictional universe. It invites reflection on how legal and societal norms can vary drastically between real-world and fantasy settings, especially in a world where power struggles, political intrigue, and death frequently disrupt traditional inheritance laws. The uncertainty expressed underscores the complexity and perhaps the chaos surrounding such matters in a universe where legitimacy, loyalty, and martial prowess often outweigh formal legal procedures. This comment also provokes thoughts about the importance of legal structures in maintaining order and how their absence or porosity can lead to unpredictable outcomes within tales of feudal lands and dynasties.