I don’t think there’s an explanation that doesn’t make this copilot’s fault. Honestly JavaScript shouldn’t allow math between numbers and strings in the first place. “1” + 1 is not a number, and there’s already a type for that: NaN
Regardless, the sum should be 5 if the first cell is text, so it’s incorrect either way.
And look at how many people saw the message. Putting more people on the bridge probably would have less of an effect than setting the extra people up on a different bridge.