The concept of variable velocity is difficult to attribute to a specific individual, as it likely emerged with early human language and understanding of motion. The mathematical representation of variable velocity, such as the integral of velocity over time, was developed by scientists like Newton and Leibniz. The discussion highlights that recognizing changing velocities is intuitive and does not require scientific knowledge. Overall, the origins of the concept are more philosophical than scientific, rooted in basic human experience. The conversation emphasizes the complexity of pinpointing the introduction of such a fundamental idea.