Question that someone answers in lies to be morally right?

Solution 1:

In this example I like best White Lie, from Merriam Webster

white lie noun Definition of white lie : a lie about a small or unimportant matter that someone tells to avoid hurting another person

It touches on your point about not seeking to be confrontational and rude, but still being a lie. I like this better than euphemism which is more about changing language (think restroom instead of toilet) to be softer, but there are overlaps.