> lifting ideas
It's not like ideas are protected by copyright though. Copyright protects the specific expression of the idea, not the idea itself. Anyone can "lift ideas" from anyone else, including proprietary software.
Except "Claude, take this code and change the variable names up a bit" is not lifting ideas, and you would not get away with doing that to software belonging to a company with a competent legal department.
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You're attacking his word choice, but the context is clear that it would be protected.