> It's impossible for someone to doubt their own sentience. The literal act of doubting is enough to dissipate all doubt.

i never found this convincing. just because you can loop does not mean you are sentient/conscious. what would it look like if you didn't exist and there was just a system that interrogated neural inputs and produced neural outputs in a loop? if anything, LLM's as an existence proof made this more likely to be the actual case.