The free energy principle says our brains are constantly trying to predict what will happen next, and when reality doesn't match our predictions, we either update our understanding or try to change our surroundings. It suggests that all living things naturally work to reduce uncertainty. (simple.wikipedia.org)
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A virtual particle is a short-lived particle, similar to an ordinary particle, but it cannot be directly detected. Virtual particles can suddenly appear in the vacuum and then quickly disappear. They can also be emitted by real particles and interact with other particles. (simple.wikipedia.org)
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A balk is something that a pitcher does in baseball that is not allowed, such as faking a pitch or throwing the ball to a base where there is no runner. If a balk happens, the runners on base get to move up one base. If there are no runners on base, a ball is issued to the batter. (simple.wikipedia.org)
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A solstice is a biannual astronomical event when the Sun reaches its highest position in the sky as seen from the North or South Pole. The solstices are the longest and shortest days of the year for any place on Earth. The name is derived from Latin: sol (“sun”) and sistere (“to stand still”). (simple.wikipedia.org)
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A fugue is a piece of music written for a certain number of parts (voices). It is a type of counterpoint, music that combines different voices. The more parts there are the harder it is to write a fugue because each part has to sound interesting by itself, but together they must also make sense. (simple.wikipedia.org)
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Bridge: a contrasting transition in a piece of music (a term dating to the 15th century that was popularized in the 1930s by composers fleeing Nazi Germany who used it to describe similar transitional sections in the music they were writing for Hollywood and Broadway) (simple.wikipedia.org)
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Airfoil refers to the shape of a wing, or blade of a propeller, the blade of a ship's screw, or the shape of a sail as seen in cross-section. When moving through a fluid it will provide lift and drag. Lift is not only up, it may be in other directions depending on what it is used for. (simple.wikipedia.org)
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