Many networks in the brain are sparsely connected, and the brain eliminates synapses during development and learning. How could the brain decide which synapses to prune?
These shifts are defined via parametric changes in the causal mechanisms of observed variables, where constraints on parameters yield a "robustness set" of plausible distributions and acorresponding worst-case loss overthe set.
Thisisespecially apparent in natural language, which is often described as a tool for making'infinite use of finite means' [8]. Previously acquired words canbeinfinitely nested using asetofgrammatical rules to communicate an arbitrary thought, opinion, or state one is in.