The apparent contradiction of these two statements lies at the heart of Johnson's argument.

At the heart of Appadurai 's argument is the idea that commodities are "things in a certain situation."

The heart of the states' argument, legal experts said, comes down, to a certain extent, to semantics: what exactly constitutes a pollutant?

The heart of his argument is 72 morphological features that he judges as common across the various language families he examines.

The heart of the Administration's argument is that Congress may constitutionally change the rules for Federal spending.

But the real heart of Professor Ronell's argument, however undeveloped it may be, is intriguing.

Kirk went straight to the heart of Uhura's argument.

But there's a paradox at the heart of Rosecrance's argument that he never quite addresses.

The heart of the administration's argument can be put succinctly: He's got bad weapons, he's shown he will use them, and he's had his chance.

At the heart of Yoo's argument is the notion that we are at war.