4.113 Philosophy limits the disputable territory of natural science.

Black’s paraphrase (p. 187): “By clarifying thoughts, philosophy demarcates the boundary of the realm where disputes are possible, i.e. the realm of states of affairs.” How can it do this? By clarifying only, not by discovering the limits of science. But if the border is disputed, how can we agree on the limit set by philosophy? Why should we accept it? How can what it offers be mere clarification and nothing more?