[brendangregg]

Fully-formed adults does not mean like-minded people, which is a different topic (groupthink).

Expressing competing professional views is indeed healthy, and it's part of our culture deck: http://www.slideshare.net/reed2001/culture-1798664

slide 13: "You challenge prevailing assumptions when warranted, and suggest better approaches"

slide 14: "You say what you think even if it is controversial"