What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: If Linda reads a book, then it is snowing. If Michael were a police officer, then Richard is a writer. If it is sunny, then Michael is a police officer. If Richard were a writer, then Linda is reading a book. If it snows, then it is sunny.
If Linda reads a book, then it is sunny can be inferred via the transitivity rule. If Michael were a police officer, then Linda is reading a book can be inferred via the transitivity rule. If it is sunny, then Richard is a writer can be inferred via the transitivity rule. If Richard were a writer, then it is snowing can be inferred via the transitivity rule. If it snows, then Michael is a police officer can be inferred via the transitivity rule.