The social paradox is that in a situation where multiple people make decisions, each person has a strategy that can achieve the best results at least in certain situations and is detrimental to others, but if everyone chooses this strategy it will lead to all People have worse results. According to the above definitions, Which of the following are social paradoxes:. ["Wang and the other three people want to contract the fish ponds in the village to increase economic income, so the three of them can't compete.", 'Villagers believe that the rivers in the village have the ability to self-purify, and they discharge domestic sewage into the rivers.', 'Before the negotiation, Lee fully considered the needs of the other party and designed the contract according to their needs, so during the negotiation, Lee always took the initiative.', 'Although there will be some economic pressure for merchants to pay management fees, it provides an economic guarantee for the formal management of the entire market and is conducive to the development of all individuals in the entire market.']