Okay. But still if a person contributes code that is not their code, even if they sign a CLA, and it ends up in the project the project can't say "not our probl

Okay. But still if a person contributes code that is not their code, even if they sign a CLA, and it ends up in the project the project can't say "not our problem they signed a CLA". The project would still need to remove the offending code.