“We have known for a long time that the pantheon of science is decorated with failure. Failures are the moving force in science: they seal off one possibility in order to expose another; they force us to look at the problem in a new light. We owe a huge debt, therefore, to the researchers whose life's work leads to a cul-de-sac. They are indirectly showing us the correct path.” FailurePositive Attitude Book:In Pursuit of Memory: The Fight Against Alzheimer's Source: In Pursuit of Memory: The Fight Against Alzheimer's