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I'm a little confused on how to apply R2T and R3T. Is R2T only applied to manufacturing defects?

So the analysis of a products liability would be:
- Manufacturing Defect - R2T & R3T analysis
- Design Defect - only R3T analysis
- Failure to warn - only R3T analysis

I'm going to use R2d for products liability in general. If the issue is design defect or failure to warn, I'll just throw a sentence in about how R3d is explicit where R2d is not.