> Physics once held that there was a substance called aether rather than vacuum, and chemistry that fire came from phlogiston, but we didn't need to rename the

> Physics once held that there was a substance called aether rather than vacuum, and chemistry that fire came from phlogiston, but we didn't need to rename the discipline when reasoning evolved. The key difference being that physical theories based on aether never actually worked, whereas computer programs based on graph algorithms solved many problems they set out to solve.