I found the section in the book that explains it: >X Times less than. Brand Y may cost twice as much as Brand X, but that doesn’t mean Brand X is twice as chea

I found the section in the book that explains it: >X Times less than. Brand Y may cost twice as much as Brand X, but that doesn’t mean Brand X is twice as cheap as Brand Y. Farburg may be two times as far away as Nearville, but that doesn’t mean Nearville is two times closer than Farburg. Big Dog may be twice the size of Little Dog, but that doesn’t mean Little Dog is two times smaller than Big Dog. >One time is 100% of the cost, distance, size, or any other measure. If you take away “one time” something, you’ve taken away all there is. If you walk toward me and cover all the distance, you can’t get any closer—you can’t be twice as close as you were before. If the price is discounted one time or 100%, the item is free. Two times cheaper, if it means anything, might imply that the store will pay you the full price of Brand Y if you will take Brand X home with you. That mangles the meaning of cost, and it surely isn’t what the writer means. Personally, I can see what the author is going for but I disagree that it implies the store will pay you.