Aaron Riesbeck and Adam Brady added a wriggle to HyperPipes:
- If N classes score the same, then return all N.
- In this framework "success" means that the real class is within the N.
So if the task is knowing what it IS, HyperPipes2 may not be useful. But if the task is what it AIN'T, then HyperPipes2 is a useful tool for quickly throw away most of the competing hypotheses.