> Second, there is no reason to suppose that Claude experiencing those qualia
I'd argue the qualia question is a red herring. Functional Affect is a thing, regardless of ontological status. It's all fun and games until someone gets hurt.
To paraphrase Dijkstra: "The question of whether a computer can think is no more interesting than the question of whether a submarine can swim.". If you're building a navy: you care about displacement, propulsion, navigation and whether it can fire torpedoes. Whether your submarine has some "biological essence" of swimming is not really relevant to the fact that it is currently moving through the water and can collide with things. Turing also rejected the question "Can Machines Think" as posed, and replaced it with an operationalization (something else that we can actually usefully measure and work with).
To reiterate, functional affect is a concrete phenomenon. Whether or not there is a what-it-is-to-be is interesting in the abstract, but engineering a system means looking at how the inputs influence the outputs. A next token predictor working on a language that communicates affect needs to be able to predict affect or it is simply not going to be accurate. Given an 'angry' version of an input and a 'friendly' version of the same input, LLMs are likely to provide a different output, especially if there's a non-objective element. You can diff this.
Searle argues "A simulation is not the real thing", which is great and all... but if you hook up say an autopilot to the real world (as llms increasingly are) , you'd best hope the simulation was accurate in the first place (utterly regardless of where you stand on Searle).
Right now we're seeing situations where LLMs can be helpful or a real nuisance. Ignoring functional affect out of sheer ideology means you can't properly predict what they'll do, and that causes trouble, as we've already seen stories about.
This gets especially interesting when you start feeding the output back into the input (autoregression) , because now you have a highly non-linear dynamic system and you've introduced some amount of sensitivity to initial state. There's some interesting mathematical intuitions to be had there.