So the cliched hypothetical was part of my point but I can be more clear if you like. You stated that ethicists should make testable predictions. This means yo

So the cliched hypothetical was part of my point but I can be more clear if you like. You stated that ethicists should make testable predictions. This means you either don't know what "testable prediction" means or you don't know what ethicists do. You told a group of people to do something that is logically impossible, testing a value claim is a logically contradictory notion. The untestable nature of value claims is literally how they are defined.