Make sure that you don't include irrelevant material just to show that you have collected it. (custom-essay.ws)
It could be a fake containing weapon - irrelevant materials which give off exactly the same radiation signature as a real bomb. (sciencedaily.com)
If you send irrelevant material to the wrong list too often, when you send something relevant, don't expect anyone to read it. (educationmattersmag.com.au)