No, “square” is the more crude analogy (there’s a lot more to “multiplication” than you might be familiar with in the case of numbers), and “double copy” is mor

No, “square” is the more crude analogy (there’s a lot more to “multiplication” than you might be familiar with in the case of numbers), and “double copy” is more natural. Don’t ask for a simpler explanation because the actual story is not yet well understood — after all it’s active research, so scientists are still groping in the dark trying to figure things out! Nobody is trying to intentionally obfuscate anything; the authors working in this area deserve tremendous credit for their sincere and sustained (decade+) effort in trying to elucidate the structure of gravitational interactions. Please don’t go around slandering them just because you don’t understand what’s going on.