aggressively repeating their opinion louder each time you try to explain why they are mistaken. First you say the correct answer they tell you your wrong. Then you try and explain why you are correct and they don’t let you. Additionally, insulting you personally when you tell them they’re mistaken.
There are many ways but one shouldn’t assume everyone is full of shit. Many people think “I can tell when someone is lying” when in reality that would be a super power. nobody can do that. I often can tell if someone is lying but a skilled liar will be able to lie to me very easily.