These are not equivalent scenarios. They are all one-shot deals and, significantly, there isn't an obvious connection between the sale and the law-breaking. The

These are not equivalent scenarios. They are all one-shot deals and, significantly, there isn't an obvious connection between the sale and the law-breaking. They could probably be altered to match a little more. Here's my take on the third: You sell special hunting rifles that are designed to kill elephants. Sometimes people need them for self defense, you say when people ask. You insist that purchasers not mention that they will use them to hunt protected species, especially elephants. One of your clients asks you to come out to the field to repair his gun. While there, you see a stack of elephant tusks in the back of his truck. You tell him to get them out of there. Then you sell him and his friends more guns over the next year. They are caught and convicted of poaching, and then you are too.