I love this argument. Not because it’s true but because it betrays the posters doubt in their own sentience.

It's impossible for someone to doubt their own sentience. The literal act of doubting is enough to dissipate all doubt. Solipsism is essentially the one certainty that every mind out there has.

Doubting the sentience of machines and even other humans is perfectly fine though. Only empathy allows people to make the leap and assume other humans have souls.

    > 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.

So you posit that humans are solipsistic by default, but some (most?) develop more and realize they’re not the only conscious being out there?

"Realize" is too strong a word. You're the only one who can verify that you're the soul who's staring out at the world through your eyes. For all you know, everyone else could be just biological automatons, golems.

Any leap beyond that is based on empathy. You have a soul, and you are human, therefore other humans could have souls too. It's a spiritual belief. Answers to questions that cannot be answered.

That's the standard Piagetian understanding of child development, yes. Humans do not start out with theory of mind, and are thus inherently solipsistic, but in most cases an understanding that there are other conscious beings with their own thoughts, goals and feelings develops between the ages of 2 and 7.

Developing theory of mind is one of the key milestones in child development.

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> Solipsism is essentially the one certainty that every mind out there has.

Not I. I'm just a Boltzmann brain.

I’m not sure what sentience has to do with it.