for one, if we're allowed to peek under the hood : motivation.
a desire not to despair is itself a component of despair. if one was fulfilling a personal motivation to despair (like an llm might) it could be argued that the whole concept of despair falls apart.
how do you hope to have lost all hope? it's circular.. and so probably a poor abstraction.
( despair: the complete loss or absence of hope. )
But how can you tell the difference between "real" despair and a sufficiently high-quality simulation?