A person with heart problems decided to use a pacemaker, a device that controls the heart beating rate, and went on to discover that pacemaker had been set incorrectly, presumably due to a software bug.
The software is proprietary. She doesn't have its source code and learning how it works is illegal.
The device has remote monitoring capabilities, so someone else controls her heart.
https://www.wired.com/2016/02/i-want-to-know-what-code-is-running-inside-my-body/
If the software was free, it would have been under user's control.
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