The discussion centers on the concept of particles gaining mass when separated, referencing Einstein's equation E=mc². Participants debate whether the surface area of particles affects their mass, with some asserting that mass gain is linked to energy changes rather than surface area. The idea of particles, like electrons, potentially being composed of smaller entities is explored, alongside the implications of particle acceleration on size perception. There is skepticism regarding the notion that particles can be observed growing in particle accelerators, with some suggesting that increased energy leads to particles occupying more space rather than actual growth. Overall, the conversation highlights the complexities of particle physics and the relationship between mass, energy, and particle structure.