Any belief or value should be verified and/or falsified…
Any belief or value should be verified and/or falsified in an exhaustive manner. Are you absolutely sure of this belief. Opinion. Belief. Value.
— from True North (Ethics, Integrity, Truth, Values)
In the book
The trouble is that we are guided by what we believe to be true, which doesn't always match what is true; from inside, the illusion feels exactly like reality. So examine your beliefs the way a scientist would: of any belief or value you carry, ask honestly — am I actually sure of this? Holding to truth takes a particular kind of nerve. […] Keep your word. Integrity is making and keeping commitments; let your word be immeasurable. Calibrate to truth. Avoiding the truth steers you by illusion; confront the brutal facts and examine your own beliefs honestly. Argue to learn, not to win. The crowd's agreement doesn't make you right — your facts and reasoning do. — True North (Ethics, Integrity, Truth, Values)