Binary flag to indicate if model is able to answer from the context

[gunajack]

🚀 The feature

Hi,

Is there a way to detect with certainty that answer is (or not) in the context? Guessing from answer is not that simple, as it sometimes replies from it's own material not present in the context. A binary flag would work better as then we can pipe it to next model etc.

Thanks, Guna

Motivation, pitch

Yes, we want to be able to handle failure exceptions of the model.