← All parts of this equation

Equation 15 · Part 2 · Humanity Has Always Been a Human–Technology System

Symbol K_t

Kt+1=Kt+Vt−Et−Ot,K_{t+1}=K_t + V_t - E_t - O_t,
KtK_t

What this part means

decision-relevant knowledge rather than stored content: [displayed formula].

Its job in the formula

KtK_t is one of the signed contributions combined to compute the quantity on the left.

Where the article explains it

Let KtK_t be decision-relevant knowledge rather than stored content: Kt+1=Kt+Vt−Et−OtK_{t+1}=K_t + V_t - E_t - O_t.

The passage around this formula

This gives an epistemic version of the cumulative-culture recurrence. Let KtK_t be decision-relevant knowledge rather than stored content: Kt+1=Kt+Vt−Et−OtK_{t+1}=K_t + V_t - E_t - O_t. where VtV_t is validated contribution, EtE_t is undetected error, and OtO_t is obsolescence. Increasing generation raises VtV_t only if validation capacity scales; otherwise it can raise EtE_t faster. AI policy focused exclusively on model output neglects the institutions that transform output into warranted action.

Read this part in the article →

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.

Open the illustrated subscripts: which member of a family? guide →

See this notation across published equations →

The article lists its research sources here.