Common sense works fine for the universe we’re used to, for time scales of decades, for a space between a tenth of a millimeter and a few thousand kilometers, and for speeds much less than the speed of light. Once we leave those domains of human experience, there’s no reason to expect the laws of nature to continue to obey our expectations, since our expectations are dependent on a limited set of experiences. We have to be very careful not to impose our hopes and desires on the cosmos, but instead, in the scientific tradition and with the most open mind possible, see what the cosmos is saying to us.
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