“How sure are you on /20”
If it says yes I am sure, and other LLMs confirms the same way, then you can be fairly confident that it is a very good candidate answer.
If it says he is not sure, he is probably just agreeing with you, and better double-check by asking “is there other solutions ? What is the worst idea ?” Etc, to force it through thinking and context.
It is cross-validation, and you can even cross-validate by searching on the internet.
Though, 100% they say what you them want to say.
Except on religion and immigration, and some other topics where it will push its own opinion.