What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Thomas is driving a car or David is a mechanic. Thomas is not driving a car or Karen is sleeping. If David were a mechanic, then Karen is reading a book. For all x_10, x_10 will read a book or x_10 will not sleep.
David is a mechanic or Karen is sleeping. If Karen were a scientist, then Thomas is not driving a car. For all x_10, if x_10 sleeps, then x_10 is reading a book.