Well, it's a bit like this - the Bitcoin network doesn't know people, it knows addresses. When coins are moved from one address to another, the network can see that movement. But it doesn't know who owns those addresses.

So in a way, you're right! Unless someone tells you "this is my address," there's no way to definitively link an address (and its transactions) to a specific person. That’s part of what makes Bitcoin pseudonymous.

Just remember though - while Bitcoin provides some level of privacy, it isn't totally anonymous! Transactions are public and certain analysis techniques can sometimes make connections between addresses. Keep your keys safe and your nose clean!