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This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 18:12:39 UTC All use subject to JSTOR Terms and Conditions

This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 …web.mit.edu/12.000/www/m2019/pdfs/Foley_2005_Science.pdf · 2015. 9. 6. · This content downloaded from 18.7.29.240

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Page 1: This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 …web.mit.edu/12.000/www/m2019/pdfs/Foley_2005_Science.pdf · 2015. 9. 6. · This content downloaded from 18.7.29.240

This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 18:12:39 UTCAll use subject to JSTOR Terms and Conditions

Page 2: This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 …web.mit.edu/12.000/www/m2019/pdfs/Foley_2005_Science.pdf · 2015. 9. 6. · This content downloaded from 18.7.29.240

This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 18:12:39 UTCAll use subject to JSTOR Terms and Conditions

Page 3: This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 …web.mit.edu/12.000/www/m2019/pdfs/Foley_2005_Science.pdf · 2015. 9. 6. · This content downloaded from 18.7.29.240

This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 18:12:39 UTCAll use subject to JSTOR Terms and Conditions

Page 4: This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 …web.mit.edu/12.000/www/m2019/pdfs/Foley_2005_Science.pdf · 2015. 9. 6. · This content downloaded from 18.7.29.240

This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 18:12:39 UTCAll use subject to JSTOR Terms and Conditions

Page 5: This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 …web.mit.edu/12.000/www/m2019/pdfs/Foley_2005_Science.pdf · 2015. 9. 6. · This content downloaded from 18.7.29.240

This content downloaded from 18.7.29.240 on Wed, 19 Aug 2015 18:12:39 UTCAll use subject to JSTOR Terms and Conditions