Worst case: The deal closes

When a lack of clarity is a major factor in a negotiation, the biggest disasters occur when the deal closes and no one realizes that confusion remains. When written contracts are to follow, a lack of clarity is usually caught by the lawyers during the drafting stage, and the ambiguity can be worked out. In a less formal situation, the confusion generally isn’t discovered until much later. When that happens, both sides feel cheated and misled. People are rarely neutral about the cause of miscommunications. Blame is never far behind the discovery that the two parties failed to communicate well. Each party feels intentionally misled. The acrimony often permanently damages the relationship between the parties. The fallout often damages reputations, too. The truth of the matter is that the results of an intentional lie and a mere miscommunication are often about the same. Preventing an innocent miscommunication is well worth the extra energy expended.