Der Begriff Bestätigungsfehler (confirmation bias) bezeichnet in der Kognitionspsychologie die Neigung, Informationen so auszuwählen, zu suchen und zu interpretieren, dass diese die eigenen Erwartungen erfüllen.—Matt Ridley: The Perils Of Confirmation Bias. The philosopher Karl Popper famously made the case that the distinguishing feature of a scientific theory is that it is falsifiable. Scientists set out to shoot down each other’s theories and only when they fail does a hypothesis become an accepted scientific fact. For some time it has been clear that is not how most climate scientists operate.