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: For all x_13, if x_13 were a server, then x_13 is a politician. Patricia is not a taxi driver or James is a server. Jessica is a sailor if and only if James is a politician. Patricia is a taxi driver or Jessica is a sailor.
Jessica is a sailor or James is a server can be inferred via the resolution rule. If James makes tea, then Patricia is not a taxi driver can be inferred via the rewriting rule. If Jessica were a sailor, then James is a politician can be inferred via the biconditional elimination rule. If James were a politician, then Jessica is a sailor can be inferred via the biconditional elimination rule.