> > At least one person has already been killed in a crash while using a proprietary software auto-control system. > This is just a silly argument. If there were an adequate sample size of open auto-control systems you could make a case.

You are taking the sentence without context, making it look like a silly argument. Kuhn was juxtaposing it to unfunded claims that open source is known to be more dangerous than closed source.

Later on the discussion takes a rational approach: "until you can prove that proprietary software assures safety in a way that FLOSS cannot..."