The method rawls uses to derive principles for determining what social institutions are just is an appeal to an imaginary situation in which people would choose principles not knowing certain possibly biasing things about themselves.

The statement is considered to be true as the method of rawls is true to derived principles as it determines the social institutions by which it appeals to situation that are considered to be imaginary and that the people associated by this are likely to chose principles even though they lack the knowledge of the possibilities.