Passage Summary: As more planes get a specific safety device, radar screens have started malfunctioning; because they share a frequency, the device is blamed for the interference.

Conclusion: The new anticollision devices are the reason air traffic control screens are losing altitude and speed data.

Reasoning: The increase in these technical glitches matches the timeline of the devices' rollout, and both systems operate on the same radio frequency.

Analysis: The argument jumps from a correlation to a definitive causal claim. While the shared frequency is a suspicious coincidence, it doesn't prove that the devices are the actual culprit. To weaken this, we should look for an alternative explanation for why the screens are failing. Perhaps there was a separate software update for the radar screens themselves or a change in weather patterns that occurred during the same two-year window.