Literary notes about invalid (AI summary)
The term “invalid” serves a dual purpose in literature, functioning both as a descriptor for those afflicted by illness and as a marker for something deemed legally or formally null. In narratives by Dostoyevsky, Brontë, and Ibsen, the word often designates characters whose frailties or chronic conditions shape their existence and the dynamics of those around them ([1], [2], [3]). Meanwhile, writers like Gibbon use “invalid” in a legal or formal sense to denote acts or documents that lack legitimacy ([4]). This multifaceted use enriches the text, allowing authors to explore themes of vulnerability, dependency, and societal critique simultaneously.