FraudWe can calculate financial fraud, but how do we measure bad faith? How can we evaluate the words of the pharmaceutical industry or of eco scientific ideologies, or the subtle deception found in political scheming? Henri Atlan sheds light on these questions through the concept of ona'ah, which in Hebrew refers to both fraud in financial transactions and the verbal injury inflicted by speech. The world of ona'ah is a world of an "in between," where the