Non-deterministic output refers to results that are not predictable with certainty even when given the same initial conditions. In the context of cryptocurrencies, this typically relates to processes such as transaction confirmation or smart contract execution.For example, when a smart contract includes a function that relies on randomness, the outcome can vary every time the contract is executed, even under the same circumstances. This randomness might arise from using unpredictable data inputs, like hash values or external events.Non-deterministic outputs can affect consensus mechanisms. When different nodes in a network produce varying results from the same inputs, it can lead to inconsistencies and complicate transaction verification. To maintain security and reliability, many blockchain systems strive for deterministic outputs, ensuring that the same inputs always yield the same results across the network.In applications that require unpredictability, such as gaming or lotteries, non-deterministic outputs can enhance fairness and security, making it a crucial concept for certain functionalities within blockchain technology.