That one is easily dealt with: "Our robot surgeon reduces the fatality rate by 98.5%. Our study of the remaining fatalities suggest we can reduce them further.

That one is easily dealt with: "Our robot surgeon reduces the fatality rate by 98.5%. Our study of the remaining fatalities suggest we can reduce them further. We hope to reach near-zero fatality rate within the year. Don't even speak of the bug. Just state what matters: this stuff is better than what we had before, and it can (and will) be even better. This may prevent talks about killer robots.