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: Jennifer is reading a book if and only if it is sunny. It is overcast if and only if it is sunny. It is not overcast. If Jennifer doesn't read a book, then it is raining.
If Jennifer reads a book, then it is sunny can be inferred via the biconditional elimination rule. If it is overcast, then it is sunny can be inferred via the biconditional elimination rule. If it is sunny, then Jennifer is reading a book can be inferred via the biconditional elimination rule. If it is sunny, then it is overcast can be inferred via the biconditional elimination rule. It is not sunny can be inferred via the biconditional elimination rule.