 There are five stable particles (termed α, γ, δ, ε, µ) and one unstable particle (β) for this automaton: their interaction (annihilation, decay, reaction) supports the emergent logic of the system. The two circles in the image above are examples of what may happen during an interaction. In the first case, \(\alpha + \delta \rightarrow \mu\), a spatial configuration representing high, low, and then ambiguous densities is mapped to a high-density signal µ; in the second, \(\mu + \gamma \rightarrow \alpha\), a spatial configuration representing high, ambiguous, and then low density is mapped to an ambiguous-density signal α (Crutchfield &amp; Mitchell 1995: 10745). The whole computational mechanics is worth being explored in more detail, but we can already safely generalize to the basic philosophical point of this and related works. 