Find out an illustration of a recent major decision (whether in business, politics and so on) that was made based on suppositions which turned out to be incorrect.
Describe why at least two suppositions for this decision were incorrect, and describe what led to their use as a basis for the decision.
What would you have done to test the validity of the assumptions? What specific types of research, testing, or surveying might you have performed if you were the decision maker in a similar condition in the future? What, if anything, would you do differently regarding the suppositions being made?