A cognitive bias is a systematic deviation from ideal reasoning.
Further reading
Yudkowsky, Eliezer (2008) Cognitive biases potentially affecting judgement of global risks, in Nick Bostrom & Milan M. Čirkovič (eds.) Global Catastrophic Risks, Oxford: Oxford University Press, pp. 91–119.
Related entries
debunking argument | inside vs. outside view | rationality | rationality community | scope neglect | speciesism | status quo bias