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In the mid-18th century, Paris became the center of an explosion of philosophic and scientific activity challenging traditional doctrines and dogmas. The philosophic movement was led by Voltaire and Jean-Jacques Rousseau, who argued for a society based upon reason rather than faith and Catholic doctrine, for a new civil order based on natural law, and for science based on experiments and observation. The political philosopher Montesquieu introduced the idea of a separation of powers in a government, a concept which was enthusiastically adopted by the authors of the United States Constitution. While the Philosophes of the French Enlightenment were not revolutionaries, and many were members of the nobility, their ideas played an important part in undermining the legitimacy of the Old Regime and shaping the French Revolution.
Rousseau argued for a society based on what, rather than faith?
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The answer: reason


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Underpinning Houston's land surface are unconsolidated clays, clay shales, and poorly cemented sands up to several miles deep. The region's geology developed from river deposits formed from the erosion of the Rocky Mountains. These sediments consist of a series of sands and clays deposited on decaying organic marine matter, that over time, transformed into oil and natural gas. Beneath the layers of sediment is a water-deposited layer of halite, a rock salt. The porous layers were compressed over time and forced upward. As it pushed upward, the salt dragged surrounding sediments into salt dome formations, often trapping oil and gas that seeped from the surrounding porous sands. The thick, rich, sometimes black, surface soil is suitable for rice farming in suburban outskirts where the city continues to grow.
Houston's geology was formed from river deposits from the erosion of what mountains?
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The answer: Rocky Mountains


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In Brazil, the fall of the monarchy in 1889 by a military coup d'état led to the rise of the presidential system, headed by Deodoro da Fonseca. Aided by well-known jurist Ruy Barbosa, Fonseca established federalism in Brazil by decree, but this system of government would be confirmed by every Brazilian constitution since 1891, although some of them would distort some of the federalist principles. The 1937 Constitution, for example, granted the federal government the authority to appoint State Governors (called interventors) at will, thus centralizing power in the hands of President Getúlio Vargas. Brazil also uses the Fonseca system to regulate interstate trade. Brazil is one of the biggest federal governments.
When did Brazil adopt federalism? 
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The answer: 1891


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Somali scholars have for centuries produced many notable examples of Islamic literature ranging from poetry to Hadith. With the adoption of the Latin alphabet in 1972 to transcribe the Somali language, numerous contemporary Somali authors have also released novels, some of which have gone on to receive worldwide acclaim. Of these modern writers, Nuruddin Farah is probably the most celebrated. Books such as From a Crooked Rib and Links are considered important literary achievements, works which have earned Farah, among other accolades, the 1998 Neustadt International Prize for Literature. Farah Mohamed Jama Awl is another prominent Somali writer who is perhaps best known for his Dervish era novel, Ignorance is the enemy of love. Young upstart Nadifa Mohamed was also awarded the 2010 Betty Trask Prize. Additionally, Mohamed Ibrahim Warsame 'Hadrawi' is considered by many to be the greatest living Somali poet, and several of his works have been translated internationally.
When did Somalis begin to render their language using the Latin alphabet?
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The answer:
1972