medium · LSAT Logical Reasoning
No lighthouse with an unreliable generator system may remain automated. Beacon L remains automated although its primary generator failed twice. Therefore its backup system is reliable.
Which one of the following, if assumed, enables the conclusion to be properly drawn?
- Beacon L's backup generator is newer than its primary generator.
- Automated lighthouses use less staff than staffed lighthouses.
- Beacon L is inspected more often than remote beacons.
- With primary failure, automation requires a reliable backup.
- Primary-generator failure is costly to repair.
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