Copyleft/guide File Diff · Conservancy Kallithea

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presentations/1hr-GPL/1hr-GPL.markdown

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 # Conditional Permissions
 + A copyleft license grants copyright permissions, conditionally.
 + Think of the phrase: &ldquo;provided that&rdquo;
 + &ldquo;provided that&rdquo;: appears (in some form) only
 + 4 times in GPLv2
 + 9 times in GPLv3.
 # Compare To Proprietary Licenses
 + Yes, the GPL has its requirements.
 + But *none* of these activities are ever permitted under proprietary
   licenses.
 + If you don't like what the GPL requires you to do, then just tell your
   client to use the proprietary software instead.
 + That way, they know the answer to every question is &ldquo;no&;rdquo,
 + rather than: &ldquo;yes, but only as long as you &hellip;&rdquo;