It would depend on your audience. Do you want to come across as more confident than you are or would you rather paint an accurate picture? If you're talking to

It would depend on your audience. Do you want to come across as more confident than you are or would you rather paint an accurate picture? If you're talking to an audience that is close to your level of expertise certainty can come across as "hiding something" not as confidence. Or perhaps we're a bunch of skeptics.