Interactions between the other factors is the most unpredictable factor.

She was turning out to be the most unpredictable female he'd ever met.

But he is also one of the most unpredictable, on and off the ice.

She was the most unpredictable woman he had ever met.

The contest for next year's Democratic presidential nomination will be the most unpredictable in half a century.

With no incumbent and a new district, this is one of the most unpredictable races in the state.

The critical moment in the trial may be its most unpredictable.

He was capable of the most unpredictable and bizarre acts.

Of the four girls, Cornelia was, as she had shown the first morning, the most unpredictable.