I've explained beneath your unblock request that I do not feel comfortable with your proclamation. You indicated that you did not realize Banglapedia was a copyrighted source. This source bears copyright notice on every page. How can we be certain, given that, that you will not copy from other copyrighted sources without noticing that they cannot be used? I myself do not feel comfortable unblocking you until you promise not to copy from any source that you cannot prove to be without copyright restriction.  (talk)