What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? It is cloudy if and only if it is snowing. It is not snowing. If it is not cloudy, then Robert is making tea. If Linda reads a book, then Robert is making tea.
If it is cloudy, then it is snowing. If it snows, then it is cloudy. It is not cloudy.