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 John were poor, then it is windy. If it is cold, then it is windy. John is poor. If Joseph were fast, then it is cold.
It is windy can be inferred via the modus ponens rule. If Joseph were fast, then it is windy can be inferred via the transitivity rule.