12/7/15
Mike Oxford FCIEEM CEcol Chair of BSI Technical Committee on Biodiversity Project Officer Associate of Local Authority Ecologists (ALGE)
michaeloxford@btinternet.com
Donald Rumsfeld United States Defence Secretary Feb 12th 2002 āAs we know, there are known knowns. There are things we knowā¦. We also know there are known unknowns. That is to say we know there are some things we do not knowā¦. But there are also unknown unknowns, the ones we donāt know we donāt knowā.
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