Distinguish useful behavior from an explanation of its origin

The same trial construction can investigate a mechanism rather than deliver a controller. In the primary hyena-mobbing study, controllers choose to approach a lion or wait. They receive five binary indicators of location, sufficient company and whether mobbing has occurred. The environment supplies movement and the rule that four hyenas inside the interaction circle can mob the lion; death remains probabilistic, with greater danger before sufficient company arrives. Random groups interact, their obtained rewards guide evolutionary selection, and the study examines the resulting populations and combinations. These supplied conditions are part of what the model can explain.

This model has no explicit emotional state or signaling channel. Its successful coordination therefore supplies neither of those mechanisms. Homogeneous copies of a successful controller and heterogeneous groups can also produce different results; preserve the grouping when interpreting individual fitness. A proposed further experiment could clamp the sufficient-company indicator to zero, preserving the five-input interface, and examine whether the acquired coordination depends on that cue. That intervention would test the implemented system. Biological use, discussed in chapter 14, additionally needs a justified correspondence between its conditions, mechanisms and observations and the population being explained. MMP.15 examines what an intervention claim follows from; MMP.16 and PHY.10 help construct an observation separating consequential alternatives. A different natural mechanism producing the same visible behavior leaves the origin question open.

A sufficient direct mechanism remains valuable here. Ijspeert and colleagues’ salamander study constructs a coupled-oscillator model from physiological hypotheses, connects it to a robot, changes drive to obtain swimming, walking and transitions, and compares its consequences with biological observations. The book’s attribution of an evolved network to this particular 2007 construction is mistaken. Direct model construction and its discriminating comparison preserve the useful research move. An engineered transition, including one found by evolutionary search, does not by itself establish the historical origin of the natural transition.

The change of receiving question determines what to retain. Engineering needs the reproducible behaving construction and evidence for its conditions of use. Learning-method development needs the obtaining operation, its starting conditions and its resulting learner. Mechanistic inquiry needs the competing account, correspondence, intervention and observation that bear on its claim. Some experiment results can contribute to more than one use, but their grounds must actually support each conclusion.