CONF Shinnick_MOSS_ICML_2025/IDIAP Transformers Pretrained on Procedural Data Contain Modular Structures for Algorithmic Reasoning Shinnick, Zachary Jiang, Liangze Saratchandran, Hemanth van den Hengel, Anton Teney, Damien ICML 2025 Workshop on Methods and Opportunities at Small Scale 2025