Fruit sours serving of fruit sours contains about 400 calories with 105 grams of carbohydrates. Fruit sours Fruit sours is a confectionery that is normally sold in bulk. Each piece is spherical and about 15mm in diameter. They come in a variety of colors; typically red (strawberry), orange, yellow (lemon), green (apple or lime), and purple (berry or black currant). Fruit sours are comparable to jelly beans in texture, with a soft candy center and a glazed outer shell. They are also mildly tart and tangy in flavor, due to citric acid and malic acid which are sometimes crystals that coat the
History of type theory History of type theory The type theory was initially created to avoid paradoxes in a variety of formal logics and rewrite systems. Later, type theory referred to a class of formal systems, some of which can serve as alternatives to naive set theory as a foundation for all mathematics. It has been tied to formal mathematics since "Principia Mathematica" to today's proof assistants. In a letter to Gottlob Frege (1902) Russell announced his discovery of the paradox in Frege's Begriffsschrift. Frege promptly responded, acknowledging the problem and proposing a solution in a technical discussion of "levels". To quote Frege: Incidentally,