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 not late. David is playing tennis if and only if it is late. Jessica is an artist if and only if David is playing tennis.
If David plays tennis, then it is late can be inferred via the biconditional elimination rule. If Jessica were an artist, then David is playing tennis can be inferred via the biconditional elimination rule. If it is late, then David is playing tennis can be inferred via the biconditional elimination rule. If David plays tennis, then Jessica is an artist can be inferred via the biconditional elimination rule. David is not playing tennis can be inferred via the biconditional elimination rule.