How to figure out if two sentences have the same meaning with AI?
This corresponds to an NLP task called paraphrase detection. It's an active area of research, as far as I know there's no ready-to-use system able to perform this task very well, but there are probably a good few methods and prototypes around. A quick search gives these links for example:


https://aclweb.org/aclwiki/Paraphrase_Identification_(State_of_the_art)
https://arxiv.org/abs/1712.02820