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 Jessica cooks, then Karen is writing a letter. If Richard drinks water, then it is windy. Mary is taking a plane or Karen is not writing a letter. If it is windy, then Jessica is cooking.
If Richard drinks water, then Jessica is cooking can be inferred via the transitivity rule. If it is windy, then Karen is writing a letter can be inferred via the transitivity rule. If Karen writes a letter, then Mary is taking a plane can be inferred via the rewriting rule.