Why it is an error to offer to duplicate the difference

In this country, we have an enormous direction of fair play. Our direction of fair play dictates with us this if the two sides also give, then who is right. If Fred builds his house on sale to $200.000, Susan makes a proposal with $190.000, and Fred and Susan are eager to compromise, both tend to think, "if we balance the account with $195.000 who would be right, because we both also gave." Perhaps it is right and perhaps it is not. It depends on the positions of negotiation of opening that Fred and Susan took. If the house is really in value $190.000 and Fred were held on his price distended to benefit only from Susan having to fall into the love with his house, then it is not right.