Since OP got banned for plagiarism ( ironic considering he started this thread) he won't be able to answer your questions, but most obvious reason is ignorance. Anyway, @nullius already explained this issue earlier in the thread and root of the word "plagiarism"
Starting a thread about plagiarism while plagiariazing, totally mindblown.
I kinda suspected the contents had some plagiarized vibe to them, guess that I was right.