Good! This article is about the NFL for machine learning (Wolpert), and also mentions NFL for optimisation (Wolpert and Macready). My recent paper [1] is about NFL for optimisation and mentions NFL for ML. The overall message is the same: most people misunderstand it, and you probably shouldn't cite it. And the anthropic principle is a sufficient assumption for this.<p>[1] <a href="https://arxiv.org/abs/1906.03280" rel="nofollow">https://arxiv.org/abs/1906.03280</a>