http://www.osdev.org/wiki/OSDevWiki:License
Why would I want to dual license if we choose the public domain?The content contained here was intended to be free. The amount of freedom will be clarified though a community selected license (see the polls). All authors of existing material will be attempted to be informed of the new official license declaration. Any author not in agreement of the new license(s) can have their content removed or choose to dual license their work. This does not apply to forum content in which all posts are owned by the author.
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I am seriously asking a question. I have mental disability and I am unable to understand complex subjects easily so I was truly wanting someone to tell me. I am lost and need help.