Imagine for a moment that the universe begins, runs it course, and then resets into a new form. There are an infinite number of possible forms the universe takes.
However, of those infinite number of possible forms, *we* can only observe those forms which permit the development of human existence. We could not, for example, observe a universe where solid matter does not exist even if we could postulate a set of rules under which such a universe could form.
That’s the basic notion of the anthropic principle: that the universe must have been ‘designed’ for us otherwise we would not be able to observe it.
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