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 Patricia were a server, then it is cloudy. If it is cloudy, then Patricia is a server. If Patricia were a server, then it is cloudy.
Patricia is a server if and only if it is cloudy can be inferred via the biconditional introduction rule. It is cloudy if and only if Patricia is a server can be inferred via the biconditional introduction rule. It is cloudy if and only if Patricia is a server can be inferred via the biconditional introduction rule. Patricia is a server if and only if it is cloudy can be inferred via the biconditional introduction rule.