[inputdev]

What do you mean by "travelling rule applicators"? Also by "travel speed of rule applicators being fixed"? Is there a fundamental space and time in which the rule applicators exist?

[wegfawefgawefg]

You wouldnt need an explicit time.

The rule applicator just traverses the graph and updates a node based on adjacent nodes.

Time for us is just the difference in relative sequence lengths between updates applied to volumes at our scale.