Saying "I don't know". Before everytime somebody asks me something I'd answer anything but "I don't know", just because they asked me I was expected to know an

Saying "I don't know". Before everytime somebody asks me something I'd answer anything but "I don't know", just because they asked me I was expected to know answer, and I kinda didn't want to break expectations. But then I started answering "I don't know" and it feels really great. Now every time I answer so unless I'm absolutely sure on my answer.