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GM stops selling the Chevy Blazer EV to deal with ‘software quality issues’
(www.theverge.com)
This is a most excellent place for technology news and articles.
You'll probably never test every possible way that a user might interact with a given piece of software, but for embedded control software, like what's responsible for managing charging and starting the car, it literally is quite feasible to test every possible input and use case.