> About 10 years later, at the Human-Computer Interaction Institute at Carnegie Mellon, Amy Ko was thinking about another problem. Debugging is like being a detective. Why didn’t the program update the cache after doing a fetch? What was a negative number doing here? Why is it so much work to answer these questions? Amy had an idea for a tool called the Whyline, where you could ask questions like “Why did ___ happen?” in an interactive debugger

Am I just confused, or does it sound like program slicing (1979)?