copying content from a past presentation

[Rahul Sundaram]

Murray McAllister wrote:

> 
> Sure, I didn't copy and paste it. However, when I wrote it I did
> research from many areas, but now it is common knowledege. Does that
> mean I still have to get permission or include references?

No. Facts are not copyrightable. Specific expressions of those facts 
are. If any material has been used substantially, adding a reference or 
giving some credit would be appropriate.

Rahul