Maybe the fact that "Europe" does not exist?
everyone knows India sits on it's own tectonic plate, like "europe" but since it has long since been merging with the Asian tectonic plate (millions and millions of years, like "europe") no one considers India it's own continent. (they call it the sub-continent, whatever that means.)
The whole definition of a "Europe" serves solely to designate one part of eurasia apart from the other.
There really are only 6 continents.
North America
South America
Australia
Antarctica
Africa
Eurasia
to claim "europe" as a separate continent is the ultimate in geographical favoritism and jingoism, spearating the educated, progressive, forward-thinking whities in "europe" from the heathen sub-races in Asia
think bout it!