Problem: Sometimes overlooked during his life, James Lind, a physician in the British navy, performed the first scientific nutrition experiment in 1747. Lind discovered that lime juice saved sailors that had been at sea for years from scurvy, a deadly and painful bleeding disorder. Between 1500 and 1800, an estimated two million sailors had died of scurvy. The discovery was ignored for forty years, after which British sailors became known as "limeys." The essential vitamin C within citrus fruits would not be identified by scientists until 1932.
How many sailors died from scurvy between the years 1500 and 1800?
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Answer: two million


Problem: His biography of Anthony the Great entitled Life of Antony(Βίος καὶ Πολιτεία Πατρὸς Ἀντωνίου, Vita Antonii) became his most widely-read work. Translated into several languages, it played an important role in the spreading of the ascetic ideal in Eastern and Western Christianity. Depicting Anthony as an illiterate and holy man who through his existence in a primordial landscape has an absolute connection to the divine truth, the biography also resembles the life of his biographer Athanasius. It later served as an inspiration to Christian monastics in both the East and the West. The so-called Athanasian Creed dates from well after Athanasius's death and draws upon the phraseology of Augustine's De trinitate.
What does the Athanasian Creed draw upon?
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Answer: Augustine's De trinitate


Problem: In abstract algebra, more general structures are defined by relaxing some of the axioms defining a group. For example, if the requirement that every element has an inverse is eliminated, the resulting algebraic structure is called a monoid. The natural numbers N (including 0) under addition form a monoid, as do the nonzero integers under multiplication (Z ∖ {0}, ·), see above. There is a general method to formally add inverses to elements to any (abelian) monoid, much the same way as (Q ∖ {0}, ·) is derived from (Z ∖ {0}, ·), known as the Grothendieck group. Groupoids are similar to groups except that the composition a • b need not be defined for all a and b. They arise in the study of more complicated forms of symmetry, often in topological and analytical structures, such as the fundamental groupoid or stacks. Finally, it is possible to generalize any of these concepts by replacing the binary operation with an arbitrary n-ary one (i.e. an operation taking n arguments). With the proper generalization of the group axioms this gives rise to an n-ary group. The table gives a list of several structures generalizing groups.
What can be replaced to simplify abstract algebra concepts?
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Answer:
the binary operation