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 cold, then it is windy. Patricia is playing squash. Patricia is playing squash if and only if it is windy.
If Patricia plays squash, then it is windy can be inferred via the biconditional elimination rule. If it is windy, then Patricia is playing squash can be inferred via the biconditional elimination rule.