does a free license make software free?

[graham]

Michael Kesper wrote:

> Well, "viral" is another expression for "spreading illness". This term
> only fits proprietary licenses which really infect the whole system built
> upon, making it non-free.

slightly tongue in cheek:  There are also bacteriophage viruses which 
eat up unpleasant bacteria, and were widely used in treatment by the old 
USSR. 'Red virus eats proprietary infections'.

Graham