Is there any way you can use the words 'Yes' and 'No' without it being in the context of answering a question?
Both words can be used to answer yes/no questions like 'is X true' or 'are you X'.
Is there any case where you could simply respond with either single word without it being a question?
If you say 'I am X' for example, and someone says 'Yes', that doesn't actually make sense, does it? You'd have to say 'That's true' instead, right?
Sorry, should have been more specific: I mean just 'Yes' or 'No' as a single word sentence. Can you say just 'Yes' or 'No' in response to a non-question and have it make sense?