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Equation 6 · Part 1 · Measuring Frontier Models: Contamination, Variance, and What a Score Can Support

Symbol D

D\mathcal{D}
D\mathcal{D}

What this part means

D 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

D is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.

The passage around this formula

The number is only as good as three things: whether Dbench\mathcal{D}_{\mathrm{bench}} resembles D\mathcal{D} , whether the xix_i are genuinely held out, and whether the indicator is measured with enough repetition to characterise its spread. All three fail routinely, and they fail in different directions.

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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.

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