I don't see how your disclaimer applies. My interpretation of no free lunch theorems is that no single algorithm works well for all classes of problems, not tha

I don't see how your disclaimer applies. My interpretation of no free lunch theorems is that no single algorithm works well for all classes of problems, not that some problems are unlearnable. The example in its proof might be contrived, but in actuality, additional assumptions can and do lead to different algorithms being picked, no?