What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is cloudy or Thomas is not cooking. If it is cloudy, then Thomas is cooking. If Patricia sleeps, then Elisabeth is not playing a game. It is cloudy if and only if Patricia is sleeping. Elisabeth is playing a game.
Patricia is not sleeping. If Thomas cooks, then it is cloudy. If it is cloudy, then Patricia is sleeping. If Patricia sleeps, then it is cloudy.