In particular, behavioural economists have argued that human beings tend to be too confident of their own abilities and tend to extrapolate recent trends into the future, a combination that may contribute to bubbles.

ECONOMIST: Financial economics

The majority of undergraduate students completely ignored this input, confident that their own ideas would be superior.

FORBES: Why Do Patients Take Their Doctor's Advice?

Companies may be confident that their own systems are bug-free, but they are less sure of those of others.

CNN: Page 4