What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? If James were fast, then Elisabeth is cooking. If William were a nurse, then it is sunny. James is not fast. If it is sunny, then James is fast. If Elisabeth cooks, then William is a nurse.
It is not sunny. If James were fast, then William is a nurse. If William were a nurse, then James is fast. If it is sunny, then Elisabeth is cooking. If Elisabeth cooks, then it is sunny.