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That would lead to unscrupulous people at the IRS valuing their friends junk as worth millions for a kickback.

What about this design?

1. Take a "dumb" open loop controller. f(t).

2. Take a "smart" closed loop controller that reads glucose levels, f(t) and outputs g(t), a correction term.

3. Clamp the correction to a safe range to get h(t)

4. Output f(t) + h(t)

If the closed loop controller crashes, the output is f(t). If the closed loop controller goes haywire, the output will be safe.