Free Deindex content ?

I have found a lot of websites that are closed now. But using archive.org i can find thier content .

The question is can i use their content on my site ..is it copied content.


Note :- Thier content is not showing anywhere on google.

Bump ...anyone have tried it..

There are already a few threads about this, eg:

http://www.blackhatworld.com/blackh...9-quick-question-about-duplicate-content.html