Asked about Choosing a problem worth solving
What would you work on if you had complete freedom?
An answer that works
Name something specific, say why it matters, why it is tractable now rather than five years ago, and what your first experiment would be. A vague area name reveals that you have not thought about it concretely.
Reading an answer is not being able to give one. The section that teaches this is Choosing a problem worth solving, 4 hours of Research taste.
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