Numerator: p_post/(1-p_post)

The passage around this formula

A transfer rate above zero says a channel is associated with a trait. It does not yet say whether the trait is a faithful copy or a garbled one, and it says nothing about whether curators along the way made the trait more or less likely to survive into the next training corpus. Two further quantities complete the construction. The mutation rate $\mu_c$=$\frac{1}{|\mathcal{M}_c^+|}$$\sum_{m\in\mathcal{M}_c^+}$$\mathbb{1}$[d($r_m$,$\rho$)>$\delta$] measures, among the trait-positive models in class c (the set $\mathcal{M}_c^+$ ), what fraction produce a response diverging from the seeded canonical form $\rho$ by more than a fixed threshold $\delta$ under a declared distance function d : a high $\mu_c$ says the…

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