Chance is a constructor for values of type Rule, mapping a system to a probably of it being picked when methods are invoked.

Chunk wraps the base system to return one that chunks reads and writes to only partially use the I/O vectors.

ClockDrift wraps the base system to return one where the clock is drifting by a random factor.

Error wraps the base system to return one that errors on almost all method calls.

LowEntropy constructs a system with a low entropy source for random data generation.

New constructs a new chaos system.