How to Disagree With People Naturally in Context

Sensei shows us how to disagree with people and correct someone if you think they have misspoken or made a mistake. Sensei: Hontel? Really? Now, this is perhaps the least confrontational way to disagree or question a statement. Nihonguam zakashi tomo hontel? So, for example, nihongu am zakashi taddisho. And then Alex said, nye, chigat tADDisho. Chigat tadd was wrong. See? You were wrong.