3 ms·

Add (management, strategy) consultants to that.

• tjr 18y ago
  And illusionists.
  • helveticaman 18y ago
    And other illusionists.
  • william42 18y ago
    Actually, a lot of them(Derren Brown, Penn & Teller, James Randi) do reveal a lot of their tricks.
• coglethorpe 18y ago
  The only thing they need to keep hidden is their own ignorance.