COULD YES MEAN NO?

In our everyday interactions, discussions, conversations, we are all after getting that YES! That positive answer that means we are in accordance, on the same wavelength, that we see the situation through the same lens, and that there is a mutual understanding on how to proceed forward. But, is this really the case? Is there scenarios or instances where the YES doesn’t necessarily mean either of the above? Is there a possibility that the YES is not something positive? … More COULD YES MEAN NO?