Asimov established that John Campbell was wrong in his opinion that it is not possible for a science fiction mystery to be fair to a reader in the same way as a classic mystery is. He provides the example of a classic mystery of Sherlock Holmes, where the detective was provided with extraordinary abilities of sight in order to pace up the plot and yet it remained fair to the readers. He argues that if such plots were fair in classic mysteries then the use of the latest scientific findings which the reader is unaware of can be used by the writer in penning down a science fiction mystery. They do not need to adhere to the rules of classic mystery and still, it would be fair to the readers.