Passage Summary: The argument maintains that even with its tendency to report 'phantom' airplanes, the collision-avoidance radar system provides a net safety benefit to passengers.

Conclusion: Passengers are safer on airplanes equipped with collision-avoidance radar than on those without it.

Reasoning: The system alerts pilots to take evasive action when a collision is possible, which outweighs the inconvenience of frequent false alarms.

Analysis: To strengthen this argument, we need to bolster the idea that the system's benefits are significant or that its drawbacks are negligible. An ideal answer might show that the 'evasive action' taken in response to false alarms is safe and does not put the aircraft at risk. Alternatively, evidence showing that the system is highly effective at preventing actual mid-air collisions would further bridge the gap between the system's functions and the claim of increased passenger safety.