A composite body made of a cannon ball and a musket ball attached together is heavier than the cannon ball alone, so it would have to fall faster than the cannon ball alone.

Among destructive thought experiments, the following subtypes can be identified: the simplest of these is to draw out a contradiction in a theory, thereby refuting it. The first part of Galileo’s famous falling bodies example does this. It shows that in Aristotle’s account, a composite body (cannon ball and musket ball attached) would have to fall both faster and slower than the cannon ball alone. A second subtype is constituted by those thought experiments that aim to show that the theory in qu