Earlier quoted context omitted.
Saying "yes" to everything, as has been explained above, has more to do with different cultural definitions of "yes" than lying. You ask me if it's going to rain, and I say yes, because I know with certainty it will rain tomorrow. Is it fair for you to call me a liar because you carried around an umbrella today?
>different cultural definitions of "yes" https://i.imgur.com/gByDqFX.png There's no 100% accuracy in weather forecasts so a mistake is understandable. Asking you if you finished your task and getting a "yes" when you haven't finished it is outright lying.
That's incompetent management. The question should be reworded to avoid yes / no answers. "How much has been done?" would be a better question.