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Now. Have a look at this.
Lots and lots of square angles , for instance like this one in a granite and other stones that are similar to granite by hardness.
What is amazing is perfect INTERNAL 90* angles.
Serious people analyzed this. It is impossible to do this other than with lasers. And the laser will leave a heat marks that could be easily seen (worst case in a microscope).
But no laser heat marks are found.