Some lawyers appear to think that such an implied license exists. I'm not a lawyer and I'm not qualified to speculate on how accurate that is, but see these exa

Some lawyers appear to think that such an implied license exists. I'm not a lawyer and I'm not qualified to speculate on how accurate that is, but see these examples: https://www.fenwick.com/FenwickDocuments/potential_defenses.pdf https://www.fenwick.com/FenwickDocuments/potential_defenses.... http://ipmall.info/hosted_resources/sipla/sipla_2005/ravicher_slides.pdf http://ipmall.info/hosted_resources/sipla/sipla_2005/raviche... https://copyleft.org/guide/comprehensive-gpl-guidech7.html https://copyleft.org/guide/comprehensive-gpl-guidech7.html