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: Patricia is running if and only if it is late. If Patricia goes running, then it is late.
If Patricia goes running, then it is late can be inferred via the biconditional elimination rule. If it is late, then Patricia is running can be inferred via the biconditional elimination rule.