Question

How can an argument be convincing, even if it seems impossible?

Answer 1

FACTS

Although lots of good arguments may seem impossible they can be received well because they are lots of facts are trickled in! Now, if it seems impossible and you don't provide it with any facts than no one will pay attention to it! So, facts is your answer!

Hope this helps!

Answer 2

I have a tip, agree with what ever your opponent is saying and then correct they're statement by making your own and that will completely catch them off guard