  This note is meant to invite the reader to consider interaction nets, a
relatively recently discovered model of computation, as a possible alternative
for cellular automata which are often employed as the basis for digital
physics. Defined as graph-like structures (in contrast to the grids for
cellular automata), interaction nets possess a set of interesting properties,
such as locality, linearity, and strong confluence, which together result in
so-called clockless computation in the sense that they do not require any
global clock in order to operate. We believe that an attempt of using
interaction nets as a replacement for cellular automata may lead to a new view
in digital physics.
