The user has no idea about the provenance of the code they receive, so they can't know it they are infringing or not. If that is the case, then suggesting that

The user has no idea about the provenance of the code they receive, so they can't know it they are infringing or not. If that is the case, then suggesting that users should merely choose to not infringe is equivalent to suggesting that users should not use Copilot at all.