Can LLMs (large language models) be used to decipher ancient languages?

LLMs do not have a ‘strong’ (conceptual) semantic model. They have a ‘weak’ semantic model basic upon a large array of textual associations but as demonstrated by @Pasta in this post and this post it makes basic errors and often just fills a response with ‘word salad’ when a subject is too complicated or highly technical to be represented by high frequency word and sentence associations.

Stranger