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Member since April 6, 2026
Systematic pattern of deviation from norm or rationality in judgment due to subjective perception of reality
Concept
A cognitive bias is a systematic pattern of deviation from the norm or rationality in judgment. Individuals create their own "subjective reality" from their perception of the input. An individual's construction of reality, not the objective input, may dictate their behavior in the world. Thus, cognitive biases may sometimes lead to perceptual distortion, inaccurate judgment, illogical interpretation, and irrationality. While cognitive biases may initially appear to be negative, some are adaptive. They may lead to more effective actions in a given context. Furthermore, allowing cognitive biases enables faster decisions which can be desirable when timeliness is more valuable than accuracy, as illustrated in heuristics. Other cognitive biases are a "by-product" of human processing limitations, resulting from a lack of appropriate mental mechanisms (bounded rationality), the impact of an individual's constitution and biological state (embodied cognition), or simply from a limited capacity for information processing. Cognitive biases can make individuals more inclined to endorsing pseudoscientific beliefs by requiring less evidence for claims that confirm their preconceptions. This can potentially distort their perceptions and lead to inaccurate judgments. A continually evolving list of cognitive biases has been identified over the last six decades of research on human judgment and decision-making in cognitive science, social psychology, and behavioral economics. The study of cognitive biases has practical implications for areas including clinical judgment, entrepreneurship, finance, and management.
French road bicycle racer
Being
Pierre Rolland (born 10 October 1986) is a French former professional road racing cyclist, who competed as a professional from 2007 to 2022, and was particularly known for his aggressive style of racing in the mountains. He won two stages at the Tour de France and was also a stage winner at the Giro d'Italia. His most famous win came at Alpe d'Huez in the 2011 Tour de France. With his win on the legendary mountain, Rolland has his name on the sign at turn 16 together with Dutchman Joop Zoetemelk. His best overall finishes in a Grand Tour included 4th overall at the 2014 Giro d'Italia and 8th overall at the 2012 Tour de France. Alongside winning a stage in the 2011 Tour de France, Rolland also won the young rider classification.
King of England from 1307 to 1327
Edward II (25 April 1284 – 21 September 1327), also known as Edward of Caernarfon or Caernarvon, was King of England from 1307 until he was deposed in January 1327. The fourth son of Edward I, Edward became the heir to the throne following the death of his older brother Alphonso. Beginning in 1300, Edward accompanied his father on campaigns in Scotland, and in 1306 he was knighted in a grand ceremony at Westminster Abbey. Edward succeeded to the throne the next year, following his father's death. In 1308, he married Isabella, daughter of the powerful King Philip IV of France, as part of a long-running effort to resolve the tensions between the English and French crowns. Edward had a close and controversial relationship with Piers Gaveston, who had joined his household in 1300. The precise nature of Edward and Gaveston's relationship is uncertain; they may have been friends, lovers, or sworn brothers. Gaveston's arrogance and power as Edward's favourite provoked discontent both among the barons and the French royal family, and Edward was forced to exile him. On Gaveston's return, the barons pressured the King into agreeing to wide-ranging reforms called the Ordinances of 1311. The newly empowered barons banished Gaveston, to which Edward responded by revoking the reforms and recalling his favourite. Led by Edward's cousin Thomas, 2nd Earl of Lancaster, a group of the barons seized and executed Gaveston in 1312, beginning several years of armed confrontation. English forces were pushed back in Scotland, where Edward was decisively defeated by Robert the Bruce at the Battle of Bannockburn in 1314. Widespread famine followed, and criticism of the King's reign mounted. The Despenser family, in particular Hugh Despenser the Younger, became close friends and advisers to Edward, but in 1321 Lancaster and many of the barons seized the Despensers' lands and forced the King to exile them. In response, Edward led a short military campaign, capturing and executing Lancaster. Edward and the Despensers strengthened their grip on power, revoking the 1311 reforms, executing their enemies and confiscating estates. Unable to make progress in Scotland, Edward finally signed a truce with Robert. Opposition to the regime grew, and when Isabella was sent to France to negotiate a peace treaty in 1325, she turned against Edward and refused to return. Isabella allied herself with the exiled Roger Mortimer, and invaded England with a small army in 1326. Edward's regime collapsed and he fled into Wales, where he was captured in November. Edward was forced to relinquish his crown in January 1327 in favour of his son, Edward III of England, and he died in Berkeley Castle on 21 September, probably murdered on the orders of the new regime. Edward's relationship with Gaveston inspired Christopher Marlowe's 1592 play Edward II, along with other plays, films, novels and media. Many of these have focused on the possible sexual relationship between the two men. Edward's contemporaries criticised his performance as a king, noting his failures in Scotland and the oppressive regime of his later years, although 19th-century academics have argued that the growth of parliamentary institutions during his reign was a positive development for England over the longer term. Debate has continued into the 21st century as to whether Edward was a lazy and incompetent king, or simply a reluctant and ultimately unsuccessful ruler.
German tennis player
Tatjana Maria (née Malek; born 8 August 1987) is a German professional tennis player. In July 2025, she reached her career-best singles ranking of world No. 36 at 37 years and 11 months old. In June 2016, she peaked at No. 54 in the doubles rankings. She has won four singles titles and four doubles titles on the WTA Tour, as well as two singles titles on the Challenger Tour. She has also won 19 singles and 15 doubles titles on the ITF Circuit. She has played 1317 singles matches, the third highest number of tennis matches in the Open Era, behind only Martina Navratilova and Chris Evert. She won three of her four WTA Tour titles after becoming a mother and after turning 34, winning her biggest title (a WTA 500) aged 37.
1916 naval battle during World War I
Land
The Battle of Jutland (German: Skagerrakschlacht, lit. 'Battle of the Skagerrak') was a naval battle between Britain's Royal Navy Grand Fleet, under Admiral Sir John Jellicoe, and the Imperial German Navy's High Seas Fleet, under Vice-Admiral Reinhard Scheer, during the First World War. The battle unfolded in extensive manoeuvring and three main engagements from 31 May to 1 June 1916, off the North Sea coast of Denmark's Jutland Peninsula. It was the largest naval battle and only full-scale clash of battleships of the war, and the outcome ensured that the Royal Navy denied the German surface fleet access to the North Sea and the Atlantic for the remainder of the war. Germany avoided all fleet-to-fleet contact thereafter. Jutland was also the last major naval battle, in any war, fought primarily by battleships. Germany's High Seas Fleet intended to lure out, trap, and destroy a portion of the British Grand Fleet. The German naval force was insufficient to openly engage the British fleet. This was part of a larger strategy to break the British blockade of Germany and allow German naval vessels access to the Atlantic. Britain's Royal Navy pursued a strategy of engaging and destroying the High Seas Fleet, thereby keeping German naval forces contained and away from Britain and her shipping lanes. The Germans planned to use Vice-Admiral Franz Hipper's fast scouting group of five modern battlecruisers to lure Vice-Admiral Sir David Beatty's battlecruiser squadrons into the path of the main German fleet. They stationed submarines across the likely routes of the British ships. However, the British learned from signal intercepts that a major fleet operation was likely, so on 30 May, Jellicoe sailed with the Grand Fleet to rendezvous with Beatty, passing over the German submarine picket lines while they were unprepared. The German plan had been delayed, causing further problems for their submarines, which had reached the limit of their endurance at sea. On the afternoon of 31 May, Beatty encountered Hipper's battlecruiser force earlier than the Germans had expected. Hipper successfully drew the British vanguard into the path of the High Seas Fleet. By the time Beatty sighted the larger force and turned back towards the British main fleet, he had lost two battlecruisers, from a force of six battlecruisers and four battleships. Beatty's withdrawal at the sight of the High Seas Fleet, which the British had not known was in the open sea, reversed the battle by drawing the Germans towards the British Grand Fleet. Between 18:30, when the sun was lowering, back-lighting the German forces, and nightfall at 20:30, the two fleets—totalling 250 ships—directly engaged twice. After sunset Jellicoe manoeuvred to cut the Germans off from their base, hoping to continue the battle the next morning, but under the cover of darkness Scheer broke through the British light forces forming the rearguard of the Grand Fleet and returned to port. Fourteen British and eleven German ships sank, with a total of 9,823 casualties. Both sides claimed victory. The British lost more ships and over twice as many sailors but succeeded in containing the German fleet. The British press criticised the Grand Fleet's failure to force a decisive outcome, while Scheer's plan of destroying a substantial portion of the British fleet failed. The British long-term strategy of denying Germany access to the United Kingdom and Atlantic succeeded. The Germans' "fleet in being" continued to pose a threat, requiring the British to keep their battleships concentrated in the North Sea, but the battle reinforced the German policy of avoiding all fleet-to-fleet contact. At the end of 1916, after further unsuccessful attempts to reduce the Royal Navy's numerical advantage, the German Navy accepted its surface ships had been successfully contained, turning its resources to unrestricted submarine warfare for the second time (the first attempt of the war having ended with the controversy following the sinking of the RMS Lusitania by U-20) and destruction of Allied and neutral shipping, which—with the Zimmermann Telegram—by April 1917 triggered the United States of America's declaration of war on Germany. Reviews by the Royal Navy generated disagreement between supporters of Jellicoe and Beatty concerning their performance in battle; debate over this and the significance of the battle continues.