How to tell if the entire Earth is just a copy?

Imagine a visiting alien accidentally spilled a bucket of inverse matter (a substance I made up just now) on the planet Earth and this stuff will annihilate with ordinary matter to produce neutrinos with perfect efficiency, erasing the earth.

Feeling remorseful the alien 4D printed the Earth in its exact state just seconds before the destruction took place, atom by atom.

How can we possibly tell that we are a copy of the original?

Additional information:

• Satellites and sensors on Earth were returned to that exact moment.
• This only affects the region of space up to the orbit of the moon.
• The irresponsible alien simply retreats silently leaving no trace of its presence and action.

posted over 4 years ago

user6760‭

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