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Equation 23 · Part 4 · What Interpretability Actually Costs to Do at Scale

Symbol h_i

Hverify  =  ∑i=1mhi,H_{\mathrm{verify}} \;=\; \sum_{i=1}^{m} h_i ,
hih_i

What this part means

hih_i is an input to the expression that computes the quantity on the left.

Its job in the formula

hih_i is an input to the expression that computes the quantity on the left.

The passage around this formula

…require passing m distinct checks — faithfulness under intervention, completeness against the behavior it is meant to fully explain, minimality against components that turn out not to matter — and let each check take hih_i researcher-hours, including the false starts a competent skeptic would force. Total verification cost per claim is Hverify  =  ∑i=1mhiH_{\mathrm{verify}} \;=\; \sum_{i=1}^{m} h_i . and the field’s own most careful examples put each hih_i measured not in minutes but in dedicated researcher-days once ambiguity has to be resolved rather than…

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Learn the underlying idea

A subscript is a label attached below a symbol. It often selects a time step, component, category, or member of a sequence.

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Sources cited in the surrounding passage

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