Trần Nguyễn Minh Huy, 20/10/2015 17:18:
Suppose that in future Google litigation Wikipedia for removing the page of Google claiming copyright
The watermark is removed by the user, not by "Wikipedia". The user of course may be considered a criminal in USA (everyone is a criminal in USA; see Aaron Swartz), but we only care about the copyright of Wikimedia projects content. If a book is in the public domain, any derivative is fine.
Nemo