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