How do you know that you know what you know?

Our group had no difficulty agreeing on the answers to the questions. The answers seemed really obvious to all of us, and so we didn't argue or need to revise any of the answers. We agreed that fact is a widely believed opinion that has enough evidence to support it, beyond reasonable doubt. We also thought that context plays an important role in seeing the truth, because we are not all the same and we view the world through different lenses, we may understand the truth differently. Also, when two experts disagree, I feel that it is important to gather from them their knowledge and opinions, and then assimilate those ideas with yours in order to create an opinion that makes sense to you. There are some things that have definite answers and those deal with things like math or science (not all questions are answered, but there are definite answers). Answers to other questions, like those that concern moral judgement, are harder to pin down and so can have indefinite answers. If the truth were to change the next day, I would feel uncomfortable and unsure, because what I once considered to be true isn't any more and now I have to seek the truth, again. (I'm sorry if this is incomprehensible, I'm tired, and I fear dolphins).