Indeed it is not, however it is your obligation not to artificially truncate your sources in a way that makes their material sound more friendly to your argument than it actually is. That is called willful deception and your posts are full of it.
It is called "excerpting" and it is widely practiced. The key to a proper excerpt is that it remains in context.
"That is called willful deception and your posts are full of it."
This, coming from the master of Clintonian parsing and ad hominem attacks? Pathetic.