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Social Science

Kwame Nkrumah

updated 2010-07-17 12:59:15

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The Great Leap Forward

updated 2010-07-18 00:02:12

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Ferdinand Magellan Timeline

  • 1490: Both parents die
  • 1495: Entered service of Manuel
  • 1504: Signed up to volunteer for an Indian voyage
  • 1505: First expedition at age 25 to India
  • 1514: Renounced nationality
  • 1519: With King Charles I's support, sets off in journey to Spice Islands
        • August 10: Five ships under Magellan's command set sail from Seville, travel Guadalquivir River
        • September 20: Set sail from Sanlucar de Barrameda
        • September 29: Reached Tenerife
        • November 27: Crossed the equator
        • December 6: South America sighted
        • December 13: Anchor in what is now Rio de Janeiro and stay till Christmas
        • December 26: Left Rio de Janeiro
  • 1520: Spice Island voyage continues
        • January 10: Reached Rio de la Plata
        • February 2: Left river of Saint Christopher
        • March 30: Puerto San Julian established
        • April 2: Conflict arose between ship captains
        • August 24: Four ships left port of Saint Julian (smallest ship lost previously)
        • October 18: Sailed from river of Santa Cruz
        • October 21: Arrived at Cape Virgenes and discovered Straight of Magellan
        • November 1: Fleet traveled through Straight of Magellan
        • November 20: San Antonio returned to Spain
        • November 26: Left Straight of Magellan
        • November 28: Remaining ships arrive in South Pacific
        • Magellan names Pacific Ocean
        • Magellan first European to get to Tierra del Fuego
  • 1521: Continues journey to Spice Islands
        • February 13: Reach equator ...

updated 2010-07-17 05:10:12

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Richard Nixon

updated 2012-05-02 21:47:41

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1906 San Francisco Earthquake

"Not in history has a modern imperial city been so completely destroyed. San Francisco is gone. Nothing remains of it but memories and a fringe of dwelling-houses on its outskirts."—Jack London

"Many burned-out people passed our house with bundles and ropes around their necks, dragging heavy trunks. From the moment they heard that fatal, heart-rending sound of the trumpet announcing their house would be burned or dynamited, they had to move on or be shot."—Rosa Barenda, eyewitness

updated 2012-05-12 19:56:21

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Mayan Calendar

The Long Count division of the Mayan Calendar comes to an end on what experts believe corresponds to December 21 2012 in the Gregorian Calendar. This date would be the 13 Ahau in the Mayan Calendar. The Long Count's starting date is what Mayans believed was the creation of the world. Some Mayan researchers say the interpretation of the end of the world on 13 Ahau is inaccurate, instead the date signifies rebirth and the start of a new cycle.Mayan Calendar Site: The Mayan Calendar USA Today: Does Maya calendar predict 2012 apocalypse? (September 7, 2007)

updated 2010-07-17 15:04:08

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How To Argue Persuasively

There is another class of arguments, called "inductive" arguments. Inductive arguments, in the words of logician P.D. Magnus, "generalize from many cases to a conclusion about all cases." http://www.fecundity.com/codex/forallx.pdf

Magnus, on p. 9 of his book forallX, gives the following example of an inductive argument:

"In January 1997, it rained in San Diego. In January 1998, it rained in San Diego. In January 1999, it rained in San Diego. Therefore, it rains every January in San Diego." http://www.fecundity.com/codex/forallx.pdf

Now, inductive arguments cannot be valid or invalid; their premises can be true or false, and thus give you more or less reason to believe the prediction or generalization. But there is no perfect structure to be found here. Inductive arguments are useful, though they are open to criticism on the ground that they don't really offer certainty like deductive arguments (i.e. the kind we discussed earlier). http://en.wikipedia.org/wiki/Inductive_reasoning

updated 2010-07-17 07:59:25

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Deng Xiaoping

updated 2010-07-17 03:11:07

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Pocahontas

updated 2012-05-12 22:05:50

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