Earlier quoted context omitted.
As always with definitive assertions regarding LLMs incapacities, i would be more convinced if one could demonstrate those assertions with an illustrative example, on a real LLM. So far, the abilities of LLM to manipulate concepts, in practice, has been indistinguishable in practice from "true" human-level concept manipulation. And not just for scientific, "narrow" fields.
The problem with mental capacities, is that they are not measured by tests. We have no valid and reliable way of determining them. Hence why "metrics psychology" is a pseudoscience. If I give a child a physics exam, and they score 100% it could either be because they're genuinely a genius (possessing all relevant capabilities and knowledge), or because they cheated. Suppose we dont know how they're cheating, but they…
On the contrary, i strongly believe that what LLM proved is the fact linguists have always told us about : that the language provides a structure on top of which we're building our experience of concepts (Sapir whorf hypothesis).
I don't think one can conceptualize much without the use of a language.