The discussion centers on the concept of the speed of light being absolute in the context of special relativity, contrasting it with the non-absolute nature of other speeds. Participants express a desire for a deeper philosophical or physical explanation for why light's speed is universally constant, as opposed to merely accepting it as a postulate based on empirical evidence. The conversation touches on the implications of Lorentz invariance and the nature of spacetime, suggesting that the speed of light may be a fundamental property rather than a derived one. There is also a consideration of how mass affects the speed of objects, with a focus on the unique behavior of massless particles like photons. Ultimately, the quest for a satisfying explanation of the absolute nature of light's speed continues, highlighting the complexity of reconciling intuitive understanding with established scientific principles.