it's a statement of fact, so we can just leave it at that. but the explanation as I understand it and I'm not a lawyer, is that scan or a facsimile is a mechanism of reproduction, and the act of reproduction doesn't give you copyright. work, derivative work, original work, demonstration of originality have all precise definitions, but in laymen terms which is also my understanding, your derivative work has to be creative and original in its own right to have a copyright.