You would need some kind of referential facts that you hold as true, then some introspection method to align sentences to those. if it can’t be done, the output

You would need some kind of referential facts that you hold as true, then some introspection method to align sentences to those. if it can’t be done, the output may be “I don’t know”. But even for programming languages (simplest useful languages), it would be hard to do.