ARC Easy

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Findings

• IC-370Knowledge entropy (sparsity of FFN memory coefficients) decreases consistently during pretraining for OLMo 1B, 7B, and Pythia 1.4B, and this decrease strongly correlates with reduced knowledge acquisition and increased forgetting in continual learning [eval]
• IC-371Artificially resuscitating inactive memory vectors by scaling the up-projection matrix K improves knowledge acquisition and reduces forgetting, with the effect more pronounced for later-stage OLMo models [eval]