How honest should you be in Scrum?

First answer: Completely.

Ah, if only the answer were that simple. Sorry, George, but Scrum and Agile provide no cookbook answer to this question.

Some people use "honesty" to mean they get a right to be brutal to others (and also to ignore their own imperfections).

Much more often, the de facto thinking is "honesty means I won't say anything obviously incorrect and I will speak up more than I did before." (Well, I don't want to hurt anyone's feelings. And I didn't say much before anyway.)

So, for most people, the operational answer is: Be a LOT more honest than you were before. Both with good news and with bad. And even about yourself.

It turns out that once there is trust on the team, this is not so hard.

Still, like most things: Easy for me to talk about here. Always challenging for a team to do at the highest level in the real world.