It's step two of a process: 1. We really need this to fight child porn, but we promise it will never be used for anything else. 2. If it can be done for child

It's step two of a process: 1. We really need this to fight child porn, but we promise it will never be used for anything else. 2. If it can be done for child porn, it can also be done for this other thing. 3. ...?