What does "need not be proved" in evidence act mean?

or:What does "need not be proved" in evidence act mean?or:exactly what it says. It's so obvious that it doesn't need to be proven. For instance if

or:What does "need not be proved" in evidence act mean?

or:exactly what it says. It's so obvious that it doesn't need to be proven. For instance if you find a head ten feet from someones body you can automatically say that person is dead. There is absolutely no logical or scientific room to prove otherwise.

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