conceptcannot
Conceptcannot is a neologism used in speculative philosophy and fictional contexts to describe a constraint that blocks the coherent formation, definition, or application of a concept within a given theoretical framework. As a term, it signals that no stable extension, criterion, or meaning can be assigned under specified conditions, due to logical, linguistic, or cognitive limits.
Although not part of mainstream philosophy, conceptcannot is employed in thought experiments to explore the boundaries
Examples in discussions might include: a concept that would need to be both determinately true and false
See also: definability, boundary problem, vagueness, noninstantiable concept, semantic paradox, category error.