You can say, “You’re right,” but don’t think it. If you can, speak the truth kindly, but if you risk harm you may want to remain silent.
Get away from anyone who questions your integrity, tries to control you, put you in a box or belittle you.
“Unthinking respect for authority is the greatest enemy of truth. If people are good only because they fear punishment, and hope for reward, then we are a sorry lot indeed.”
— Albert Einstein