Within the tactic of good guy/bad guy (synonyms are good cop/bad cop or black hat/white hat) oftentimes positive and unpleasant tasks are divided between two negotiators on the same negotiation side or unpleasant tasks or decisions are allocated to an (real or fictitious) outsider. The good guy supports the conclusion of the contract and emphasises positive aspects of the negotiation (mutual interests). The bad guy criticises negative aspects (opposing interests). The division of the two roles allows more consistent behaviour and credibility of the individual negotiators. As the good guy promotes the contract, he/she can build trust with the other side.