1. A method of updating an efficacy of inhibitory connections of a spiking neuron network, the method comprising, for an input signal: based on a first rule, potentiating a first plurality of inhibitory connections associated with a first portion the network, individual ones of the first plurality of inhibitory connections and a second plurality of inhibitory connections configured to provide inhibitory signals to neurons of the first and the second portions, respectively; and based on a second rule, potentiating the second plurality of inhibitory connections; wherein: the neurons of the first portion are configured to respond to a first feature; the neurons of the second portion are configured to respond to a second feature; the first rule is configured to cause a first inhibitory signal; the second rule is configured to cause a second inhibitory signal that is smaller than the first inhibitory signal; and the first rule and the second rule cooperate to suppress the neurons of the first portion from response to the first feature.