Policy contains Assertion 1, Assertion 2, and Assertion n. There is an arrow from the Request to Assertion 1, another arrow from Assertion 1 to Assertion 2, another arrow from Assertion 2 to Assertion n, and a final arrow from Assertion n. A second set of arrows flow in the reverse direction, from the Request to Assertion n to Assertion 2, Assertion 2 to Assertion 1, and a final arrow from Assertion 1.