Have to raise my hand then to shock you.. what else should the coordinate that is also indicated on the axes mean? Yeah, but it's not clear that the instructio

Have to raise my hand then to shock you.. what else should the coordinate that is also indicated on the axes mean? Yeah, but it's not clear that the instructions text is talking about that symbol, *because it doesn't say so* explicitly. Sometimes a small level of information redundancy is good for communicating with humans, instead of forcing them to make the correct inferences in place.