That disclaimer is irrelevant to your question.
But maybe I'm not being clear. Facts are facts, and they are not protectible by copyright. What is protected by a copyright is the way you express the facts.
"The way I see it, you can't do that without the authors (copyright owner) permission."
You can copy any uncopyrightable information you would like to copy without anyone's permission.
The classic cases involve telephone books. It turns out that an alphabetical list of names and telephone numbers is NOT copyrightable.
If you read the Feist case, you should get a pretty good grip on what I'm driving at here:
http://www.law.cornell.edu/copyright/cases/499_US_340.htm
FEIST PUBLICATIONS, INC. v. RURAL TELEPHONE SERVICE CO.
It is this bedrock principle of copyright that mandates the law's seemingly disparate treatment of facts and factual compilations. "No one may claim originality as to facts." Id., ç 2.11[A], p. 2-157. This is because facts do not owe their origin to an act of authorship. The distinction is one between creation and discovery: the first person to find and report a particular fact has not created the fact; he or she has merely discovered its existence. To borrow from Burrow-Giles, one who discovers a fact is not its "maker" or "originator." 111 U.S., at 58. "The discoverer merely finds and records." Nimmer ç 2.03[E]. Census-takers, for example, do not "create" the population figures that emerge from their efforts; in a sense, they copy these figures from the world around them. Denicola, Copyright in Collections of Facts: A Theory for the Protection of Nonfiction Literary Works, 81 Colum. L. Rev. 516, 525 (1981) (hereinafter Denicola). Census data therefore do not trigger copyright because these data are not "original" in the constitutional sense. Nimmer [p*348] ç 2.03[E]. The same is true of all facts -- scientific, historical, biographical, and news of the day. "They may not be copyrighted and are part of the public domain available to every person." Miller, supra, at 1369.
[16] Factual compilations, on the other hand, may possess the requisite originality. The compilation author typically chooses which facts to include, in what order to place them, and how to arrange the collected data so that they may be used effectively by readers. These choices as to selection and arrangement, so long as they are made independently by the compiler and entail a minimal degree of creativity, are sufficiently original that Congress may protect such compilations through the copyright laws. Nimmer çç 2.11[D], 3.03; Denicola 523, n. 38.