How, exactly, do we measure language fluency?

For all you fluent English speakers out there, don’t you think it’s interesting that “the Kronecker pairing on the homology and cohomology of a space should be thought of as an analogue (in fact it is a generalization) of integrating a differential n-form along an n-dimensional submanifold?”

This excerpt is from a lecture on algebraic topology, an advanced and (to some) obscure branch of mathematics. I imagine that most native English speakers reading this article did not understand it at all.

► read more here : http://j.mp/1DblxLX