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Run Think Environment.

Virtual machine-based languages, interpreted languages, and languages with runtime environments encourage users to view the execution environment as a black box. The goal here is to make programming easier by reducing the scope of the mental model the programmer must maintain. When bugs occur in these execution environments, you're left with a complete gap in understanding. You might solve this by understanding more about the execution environments, but then what is the point of that abstraction?

Devon H. O'Dell: The Debugging Mindset