[dtertman]

That it is very important to communicate the strength of an opinion, and moreso the higher up in an organization you go.

If you say everything like a Gospel truth, even when you're just brainstorming, the two end-states I've found are constant argument or constant acquiescence, and neither one is healthy for collaboration.

Conversely, if you always hedge your opinions, even ones that are against your moral code, you may end up unhappy, doing some unsavory stuff, etc.

A book that goes through this in detail is "Opening Doors To Teamwork and Collaboration". They have a very jargon-heavy approach to it ("notion", "stake", "boulder", "tombstone"), which I don't agree with, but the concept is important.