In Artificial Intelligence (AI), an environment is uncertain if it is.

In artificial intelligence, environment is that surrounds an agent. Environment is where agent lives, do its work or we can say that surrounding in which agent is present.

Environment is clearly distinguishable from the agent, it is not the part of the agent. An environment can have various attributes from the point of view of the agent. These are :

1) Observable and partially observable: An agent is considered to be an agent only if it has the ability to observe its environment. In some cases, environment may be partially observable. Uncertain environment is not fully observable.

2) Deterministic and stochastic: A deterministic environment is one where any future state of the environment can be completely determines from preceding state and actions of agent. It is stochastic if there is some element of uncertainty.

3) Episodic and sequential: If each of agent’s tasks do not rely on past performance than episodic otherwise it is sequential.