Whether it will persist or not is highly debatable.

It is highly debatable where the fault lies in many of these cases.

Whether or not they could ever get down there to retrieve it was highly debatable.

Whether these are to be regarded as possible progenitors of opera is highly debatable.

Environmental conservation is a highly debatable topic because of its nature.

"There's not a gruesome scene in the film," he said, making a point that's highly debatable.

The dating of Kharavela's period has been highly debatable and controversial.

It is highly debatable whether the rebels' new tactics can be successful.

This sounds highly debatable, but perhaps that technical argument will be had on another day.

I have to say that must be highly debatable.