> But if B is moved by another body, which in turn is moved by another body, and so on, then we face either an infinite regress or a cycle, with each body moving the next. To handle this, Leibniz invokes p4, taking together all bodies which are movers, and referring to the whole as C.
So the argument hinges on the composition of (all) moving objects and the premise that the composed body is also moving but cannot be moved by another body since all the bodies are in the composition.
Supposing the only objects in the universe are two objects moving each other (in a cycle), they are considered a single body moved by an immaterial body because their composition cannot move itself? So everything boils down to where does energy come from?