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 sleeps, then it is overcast. If it is late, then Linda is cooking. Linda is not cooking. James is a musician or Linda is sleeping. If James were a musician, then it is overcast.
It is not late can be inferred via the modus tollens rule. It is overcast can be inferred via the disjunction elimination rule.