bashing your point

The act of claiming that something validates your point, but you don't explain why, and instead use statements such as, "It's obvious why". Often, the thing in question DOES NOT validate your point, and so you have to lie in order to keep your point intact.

Person A: This balloon proves my model!
Person B: But why?
Person A: Why? It's obvious why!
Person B: You need a reason why.
Otherwise, you're bashing your point.