Hexagoen

Personally, I tend to just come out when I don't know enough about a topic to defend a stance (if I'm interpreting this correctly). I don't like giving false information, but I don't like appearing as if I know more than I actually do. On the other hand, I like being proven wrong if said person can substantiate their position with a solid argument themselves. You learn from being wrong and it's totally okay to be in that position.

It's better to just admit that you're wrong or not knowledgeable about the subject. If you try to bs your way through an argument or a discussion about something, then you're likely to end up looking like Donald Trump trying to describe the specifics of his policy, ie, you don't know what you are talking about, but you attempt to seem as if you do by adding in a ton of filler content.

Discretion is the better part of valour. Certainly it is foolish to express an ill-informed opinion, and yet one may be tactful enough to inquire about a foreign subject without making presuppositions.