Explore the concept of number sense as an emergent property of the manipulation brain in this 47-minute lecture by Pietro Perona from the California Institute of Technology. Delve into topics such as natural numbers, counting, subitization, and innate numerical abilities. Examine key experiments like the Simons Experiment and the David Burr John Ross Experiment, which shed light on the relationship between perception and language in numerical cognition. Investigate the role of supervised learning in developing number sensitivity, and consider the implications of this research for understanding how the brain processes numerical information. Analyze the structure, predictions, and conclusions drawn from this exploration of the manipulation brain's role in numerical cognition.