Contemporary feminists may differ regarding the degree to which women's distinctiveness and unique ways of knowing are inbuilt and essential or socially constructed, and whether it ought to supplement prevailing male conceptions of truth in some androgynous model, or (as some radical feminists suggest) override them completely. Nevertheless, all agree that the feminine perspective has something valuable to contribute, challenging prevailing male conceptions of truth as the irreducible, self-evident, and exclusive prism of reality.