Premise: A global city , also called world city or sometimes alpha city or world center , is a city generally considered to be an important node in the global economic system . Tokyo . Tokyo ranked first in the Global Economic Power Index and fourth in the Global Cities Index . The city is considered an alpha + world city -- as listed by the GaWC 's 2008 inventory -- and in 2014 , Tokyo was ranked first in the `` Best overall experience '' category of TripAdvisor '' 's World City Survey ( the city also ranked first in the following categories : `` helpfulness of locals '' , `` nightlife '' , `` shopping '' , `` local public transportation '' and `` cleanliness of streets '' ) .
Hypothesis: Tokyo only ranked seventh in an index pertaining to alpha cities.
Label: CONTRADICTION