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_17, x_17 is a scientist if and only if x_17 will go running. Elisabeth is running or Susan is not listening to a song. Susan is listening to a song.
If Susan listens to a song, then Elisabeth is running can be inferred via the rewriting rule. For all x_17, if x_17 were a scientist, then x_17 is running can be inferred via the universal biconditional elimination rule. For all x_17, if x_17 goes running, then x_17 is a scientist can be inferred via the universal biconditional elimination rule.