The Mysterious Case of the JetBlue Flight That Went into Free Fall

> "Within seconds, the other ELAC detected that something was amiss and took over, leveling the nose and returning to normal flight. The faulty bit caused by the cosmic-ray strike was erased from memory,"

I'd have thought the backup ELAC would've detected a divergence in its output relative to the primary's a lot sooner. And for something as critical as this, shouldn't there be 3 ELACs so majority voting could identify the anomalous one?