We don't know, we won't guess, but we have to have a policy, and that policy is based on what we do know. If what we do know changes, we change the policy. The

We don't know, we won't guess, but we have to have a policy, and that policy is based on what we do know. If what we do know changes, we change the policy. The problem with that is that policy changing every week is not something that western populations can deal with, so policy changes have to be dampened somewhat.