Authors have long employed the word "indigestible" to evoke both literal and metaphorical meanings in literature. In culinary texts, for instance, Rousseau notes that it is not the vegetable itself but the flavouring that renders a diet indigestible [1], while Apicius contrasts overcooked and underdone fare by labeling the latter as indigestible [2]. Similarly, critiques of culinary art emerge in passages that blame artificial cookery for creating simple aliments that become indigestible [3] and in discussions of certain foods like corn, known for its reputed indigestibility [4]. Beyond food, the term is wielded metaphorically to underscore ideas or objects that challenge smooth assimilation, as seen when a well-meaning but indigestible notion is alluded to [5], or when Nietzsche contrasts the nourishing with what is metaphorically left on the plate [6]. Thus, whether critiquing recipes or abstract concepts, authors have found the concept of indigestibility a versatile tool for commenting on quality and comprehensibility in various contexts.