must send modifications license acceptable?

[Rahul Sundaram]

Patrice Dumas wrote:
> On Sat, Aug 25, 2007 at 11:16:34PM +0530, Rahul Sundaram wrote:
>> A requirement to send modifications to anybody is non-free. A request to do 
>> so as in the Academic Free License is not.
> 
> A request? It is not a request, it is an obligation, there is a 'must':
> 
>   You must make a reasonable effort under the circumstances to obtain the 
>   express assent of recipients.

Checking again, this section comes under "Acceptance and Termination"

"You must make a reasonable effort under the circumstances to obtain the 
express assent of recipients to the terms of this License"

This does not talk about sending modifications to the original author or 
to anyone else for that matter. It only tells you to make reasonable 
efforts to communicate the terms of the license to recipients bound by it.

Any license that mandates a requirement to send all modifications to the 
original authors is clearly non-free.  Academic Free License does not do 
that. The other licenses you quotes appear to do this.

Rahul