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Don Quixote and his sidekick Sancho Panza, as illustrated by Gustave Doré: the characters' contrasting qualities [1] are reflected here even in their physical appearances. In any narrative, a foil is a character who contrasts with another character, typically, a character who contrasts with the protagonist, in order to better highlight or differentiate certain qualities of the protagonist.
The FOIL method is a special case of a more general method for multiplying algebraic expressions using the distributive law. The word FOIL was originally intended solely as a mnemonic for high-school students learning algebra. The term appears in William Betz's 1929 text Algebra for Today, where he states: [2]
Foil (architecture), decorative device derived from cusps of circles; Foil stamping, a printmaking technique; Foil (fencing), one of the three weapons used in modern fencing; Foil (fiction), a subsidiary character who emphasizes the traits of a main character Comedic or comic foil, the straight man in a comedy double act
A man wearing a tin foil hat. A tin foil hat is a hat made from one or more sheets of tin foil or aluminium foil, or a piece of conventional headgear lined with foil, often worn in the belief or hope that it shields the brain from threats such as electromagnetic fields, mind control, and mind reading.
The foil is like a wing that extends into the water under the surfboard, it causes the board to lift out of the water as it gains speed. 'Surf's up' takes on new meaning for California ...
A foil is a very thin sheet of metal, typically made by hammering or rolling. [ 1 ] [ 2 ] Foils are most easily made with malleable metal, such as aluminium , copper , [ 3 ] tin , and gold . Foils usually bend under their own weight and can be torn easily. [ 2 ]
Aluminium foil (or aluminum foil in American English; occasionally called tin foil) is aluminium prepared in thin metal leaves. The foil is pliable and can be readily bent or wrapped around objects. Thin foils are fragile and are sometimes laminated with other materials such as plastics or paper to make them stronger and more useful.
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