**18.4.2 Discrete**

Discrete space-time, but discrete space-time tends not to be quantum, as C drives Boolean logic and might not allow cycles but does suggest mapping quantum space-time into protospace-time via XOR gates (Zizzi, 2003).

Researchers from Kondratyev, Cortadella, Kishinevsky, Lavagno and Yakovlev (1999) through to Zizzi (2003) and Schneider, Brandt, Schucle and Tuerk (2005) have looked at relationships with logic gates.

Causality cycles between systems, preconditions, and "that stronger notions of causality are reasonable, as long as they retain the relation between stabilization of circuits, existence of dynamic schedules and constructive programs" (Schneider, 2005).
