hard · LSAT Logical Reasoning
The Verrow Horological Guild certifies a watch movement as 'Chronometer Grade' if it passes either the 15-day thermal-variance test or the vibration-endurance test. The Aurelian Mark II failed the vibration-endurance test. A guild reviewer concludes that the Aurelian Mark II cannot be certified Chronometer Grade.
The reviewer's conclusion depends on which one of the following assumptions?
- Every watch that passes the vibration-endurance test also passes the thermal-variance test.
- The vibration-endurance test is a more reliable indicator of movement quality than the thermal-variance test.
- The Aurelian Mark II did not also separately pass the guild's required 15-day thermal-variance test either.
- No watch has ever been certified Chronometer Grade after failing both of the guild's required tests.
- The Aurelian Mark II's manufacturer intends to resubmit the movement for thermal-variance testing next year.
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