The problem with moral obligation › Brute facts are relative to a description

Anscombe's discussion of Hume introduces an example involving a grocer, supplied potatoes, a bill, and money owed. She uses it to ask how one description is supported by a set of more basic facts. She calls these facts "brute" relative to that description.

The relation is not a division between entirely interpretation-free facts and everything social. Facts that are brute relative to one description may themselves rest on other descriptions. The fact that goods were supplied can support a statement about a debt; the supplying can in turn be described through events involving delivery.

Institutional context and exceptions matter. Ordering and receiving something may normally help justify the claim that payment is owed, while special circumstances change what follows. Anscombe explicitly resists treating a supporting set of facts as a complete analysis that automatically entails the higher description in every possible context.

A statement that someone gives a shilling also presupposes monetary institutions without itself being a description of the entire institution. This distinction lets us see how ordinary descriptions can depend on a wider practice. The dependence does not make every such statement a mere expression of feeling.

The grocer example challenges an oversimplified separation of descriptive language from terms such as "owes." It does not provide a general proof that any desired moral conclusion follows from whatever facts we choose. The particular relations between descriptions have to be explained.