What is a non-deterministic protocol?

A non-deterministic protocol is a type of protocol in which the outcome or behavior can vary even when the same initial conditions and inputs are applied. This variability can arise from factors such as randomization, timing, or concurrent operations, leading to different results on different executions. Non-deterministic protocols are often used in distributed systems and algorithms where flexibility and adaptability are required. However, they can complicate analysis and debugging due to their unpredictable nature.