Table of Contents 1 Summary 2 Context 2.1 Why not weak HIA rather than strong HIA? 2.2 Weak vs. strong HIA methods 3 Main statement 4 Why weak HIA attempts don’t seem so promising 4.1 Unpromising properties 4.2 More reasons 4.3 Aside: polygenic embryo selection 5 Caveats 5.1 Caveat: Any specific argument could easily be wrong 5.2 Caveat: Weak HIA would be great! 5.3 Caveat: Weak HIA may have surprising beneficial effects 5.4 Caveat: Flimsy foundations 5.5 Caveat: Scaling a working weak method is a medium priority 6 Conclusion (Note: I was unsatisfied with a draft of this, heavily edited it, and I’m still unsatisfied. The notion of “weak HIA method” here is muddled, maybe conflating multiple things that shouldn’t be conflated here. It may be used a bit inconsistently, and may make some arguments tautological or contradictory depending on local interpretation of the notion. I think most of the reasoning is still useful, so it’s better to p...