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 Richard were a politician, then it is late. If William were an artist, then it is cold. Richard is a politician. If it is late, then William is an artist.
It is late can be inferred via the modus ponens rule. If Richard were a politician, then William is an artist can be inferred via the transitivity rule. If it is late, then it is cold can be inferred via the transitivity rule.