But it is a nice object lesson in the basic economic proposition first put forward by David Ricardo as the Iron Law of One Price.

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The lesson learned was basic and deeply ingrained: borrowing to buy assets above your means is a sketchy proposition, as the recent owners of 16.5 million foreclosed houses will attest.

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The bigger question is whether Yelp can go beyond the basic services it offers to provide a value-added proposition.

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In the subsequent eight years of litigation, arguments centred on a basic proposition.

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The two matters, Proposition 8 and defense of DOMA, feel interrelated since on a basic level, they both touch on same sex marriage.

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