Equation 23 · Part 2 · Measuring What a RAG System Retrieves, Not Just What It Answers
Symbol R
What this part means
R is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
R is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol R→Article meaning
The passage around this formula
…because contamination corrupts exactly the term this article has been isolating: a contaminated model can produce a correct, fluent answer with the retriever disabled entirely, which means P( R) is inflated by memorisation rather than by any generalisable capability, and every end-to-end score computed against that reference set overstates what the retrieval component is doing.
Learn the underlying idea
A variable is a named place for a value. Its letter is a local label: x can mean position in one formula and a data point in another.
Open the illustrated variables: a letter stands for a value guide →
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Sources cited in the surrounding passage
These citations provide research context; check each source for the exact claim it supports.