keep a running estimate over distribution over possible States for each time T pictorially often it's drawn this way this graph captures the causal relationships that are present in our set of assumptions so X again is the state over time use the actions we take actions will affect the next state the previous state will affect the next state and the observation in this case assumed to just depend on the state the state of the world determines what we might measure and so when we get to look at this graph the explicit assumptions