SPOCK: (dictating) Personal log, stardate 5373.9, subjective time. The timeline seems to have changed again. Yet I do not believe I have done anything to disrupt it. My memory is quite clear regarding the date my cousin saved my life, and it is tomorrow. The kahs-wan ordeal is an ancient rite of warrior days. When Vulcans turned to logic, they reasoned they must maintain the tests of courage and strength to keep pure logic from making them weak and helpless.