Sometimes maybe say if you were in a conversation with someone/people you’re not comfortable with and you will not offer your whole stance on a topic or even sometimes act like you know nothing (when you do) just to avoid to have to talk, or come off the wrong way

There are times where I will just say “why” but I know full well why, just so I can avoid offering anything else on the topic. 

Obviously I don’t know everything.. I’m just wondering if anyone else feels like they withhold information just to avoid having to talk especially if it’s in a group of people