Everybody knows the multiple choice but at the end the solution is unique. So imagine now that there is only one error and all the other choices are correct, what would be your choice? In a classical way of thinking, this doesn’t change anything. Because we use to choose only one solution, it’s strange to take many. This seems to be too much. But hyperstructures constructed on hypergroups have this property. So there is no more problem of the choice of your solution between good propositions. You can take all of them at the same time. This is a manifold of choices.