Yes but in these situation the copyright assignment is a separate contract underwritten by the person committing. What (I think) driverdan means is that an OSS licence legally cannot substitute this separate contract - one cannot automatically assign one's own copyright to another entity by following an OSS licence.
Comments
There are software projects that use/require copyright assignment (notably many GNU projects require assignment to the FSF).
Yes but in these situation the copyright assignment is a separate contract underwritten by the person committing. What (I think) driverdan means is that an OSS licence legally cannot substitute this separate contract - one cannot automatically assign one's own copyright to another entity by following an OSS licence.