Words That Kill Creativity

If you want to spur on creativity in your group, take a cue from author Ken Lizotte. Lizotte in his book, The Expert's Edge: Become the Go-To Authority People Turn to Every Time, says there are a few phrases thoughtleaders should not speak because they kill creativity. They are: "We tried that before." "It's a good idea, but we really don't have time to implement it." "You're joking, of course." "That's all very well in theory, but practically speaking . . . " "Top management will never go for it." "But we've never it done it that way before." "I'm afraid you're ahead of your time." "Has anyone else ever tried it?" "We should form a committee and study this idea further." I was just thinking--I hear we should form a committee--all the time. Have you used such phrases before? What do you think of Lizotte's comments?