What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Barbara is reading a book if and only if it is cold. If Karen goes running, then it is cold. If John were a musician, then Karen is running. If Barbara reads a book, then John is a musician.
If John were a musician, then it is cold. If Barbara reads a book, then Karen is running. If Barbara reads a book, then it is cold. If it is cold, then Barbara is reading a book.