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 it is overcast, then Jessica is poor. If it is cold, then Elisabeth is reading a book. If Elisabeth reads a book, then it is overcast.
If it is cold, then it is overcast can be inferred via the transitivity rule. If Elisabeth reads a book, then Jessica is poor can be inferred via the transitivity rule.