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: It is raining if and only if Patricia is a poet. Patricia is a poet or Robert is a taxi driver. It is raining if and only if Robert is a taxi driver.
If it rains, then Patricia is a poet can be inferred via the biconditional elimination rule. If it rains, then Robert is a taxi driver can be inferred via the biconditional elimination rule. If Patricia were a poet, then it is raining can be inferred via the biconditional elimination rule. If Robert were a taxi driver, then it is raining can be inferred via the biconditional elimination rule.