Dont just open your argument with 'Nope'. It makes you sound like an ass. Like the people who start with 'sorry' and then go on to demonstrate that they're not

Dont just open your argument with 'Nope'. It makes you sound like an ass. Like the people who start with 'sorry' and then go on to demonstrate that they're not in fact sorry. You could say, 'Ive always thought' or 'I have evidence that demonstrates that your point isn't totally correct' or something that respects the original poster a bit more than outward dismissal.