It's wise to be open and honest in your dealings.
Arnold is selling his car.
Arnold wants to get the best price for his car.
Arnold discloses his car has a major issue and adjusts the price accordingly.
Arnold lists his car for sale but hides the fact that it has a major mechanical issue, so he can charge a higher price.
Arnold sells his car to a buyer who knows what they're getting themselves into.
The buyer of Arnold's car sues Arnold for fraud.