There are a lot of unknowns.

We were assured that that information would go to the mayor.

There are a lot of unknowns about these diseases, and CWD is probably the most enigmatic.

There's always the risk that there are unknown unknowns.

There are a lot of unknowns. The good thing is that I think there are a lot of teams in the same situation we are in.

To gain the best investment leverage going forward, we will continue our strategy of collaboration, such as our alliance with IBM on the Cell BE processor; and with research hospitals such as the Massachusetts General Hospital.