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: Robert is not a scientist. If Linda were curious, then it is not late. If Thomas doesn't listen to a song, then it is late. It is snowing if and only if Thomas is listening to a song. It is snowing if and only if Robert is a scientist.
If it snows, then Thomas is listening to a song can be inferred via the biconditional elimination rule. If it snows, then Robert is a scientist can be inferred via the biconditional elimination rule. If Thomas listens to a song, then it is snowing can be inferred via the biconditional elimination rule. If Robert were a scientist, then it is snowing can be inferred via the biconditional elimination rule. It is not snowing can be inferred via the biconditional elimination rule.