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Improving Generalization in Meta Reinforcement Learning using Learned Objectives
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Biological evolution has distilled the experiences of many learners into the general learning algorithms of humans. Our novel meta reinforcement learning algorithm MetaGenRL is inspired by this process. MetaGenRL distills the experiences of many complex agents to meta-learn a low-complexity neural objective function that decides how future individuals will learn. Unlike recent meta-RL algorithms, MetaGenRL can generalize to new environments that are entirely different from those used for meta-training. In some cases, it even outperforms human-engineered RL algorithms. MetaGenRL uses off-policy second-order gradients during meta-training that greatly increase its sample efficiency.
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Cited by 1 Pith paper
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Evolution and The Knightian Blindspot of Machine Learning
ML's formalisms, particularly RL's, exclude Knightian uncertainty, and evolution's diversify-and-filter mechanisms point toward a direct remedy.
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