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Materials informatics, the application of data science and machine learning to materials research, has revolutionized the discovery and design of new materials. However, the field faces significant challenges in reporting failure cases, negative results, and biases, which are often silenced in the literature. This review examines documented failures in materials informatics, such as data bias, model overoptimism, and reproducibility issues, and highlights the systemic factors that lead to their underreporting. Drawing on 30 recent peer-reviewed articles, we explore themes including data quality, algorithmic limitations, and publication bias. The objectives are to assess what is typically documented, identify silenced aspects, such as unsuccessful experiments, and propose strategies for more transparent reporting. By addressing these gaps, the review aims to foster a more robust and trustworthy materials informatics ecosystem, ultimately accelerating sustainable innovation in materials science.

The integration of artificial intelligence (AI) into materials science has significantly accelerated discovery and optimization processes. Yet, it simultaneously amplifies long-standing epistemic vulnerabilities rooted in the systematic underrepresentation of negative results. Failed experiments, unstable material phases, and inaccurate predictions are often excluded from the published record, resulting in datasets that are skewed and shape AI model training and inference. This conceptual paper examines how epistemic gaps distort the dynamics of data generation, model development, and experimental validation in materials AI. By synthesizing literature on publication bias, model robustness, and uncertainty-aware learning, the study demonstrates how positive-only knowledge bases foster overconfident predictions, limit generalization, and obscure material boundary conditions. To address these challenges, the paper proposes a failure-aware epistemic learning framework that structurally integrates negative results into AI-driven materials discovery through recursive feedback structures, uncertainty modulation, and inclusive steering logics. Ethical reasoning situates this framework within principles of epistemic accountability, sustainability, and responsible innovation. By reinterpreting negative results as indispensable sources of information rather than peripheral artifacts, the paper advances a conceptual foundation for more resilient, transparent, and reliable AI applications in materials science.