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Originally Posted by Count Zero
Jay, I don't understand what you mean by "provenance", in this context.
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I'm not Jay, but the word for me:
Wikipedia: Provenance:
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Provenance is the origin or source from which something comes, and the history of subsequent owners (also known in some fields as chain of custody). The term is often used in the sense of place and time of manufacture, production or discovery. Comparative techniques, expert opinion, written and verbal records and the results of tests are often used to help establish provenance.
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So if someone shows you an image that has a facelike object on the surface of Mars, and claims it means something, they should at a minimum, be able to demonstrate the origin of the image and that it hasn't been damaged or corrupted between there and your eyeballs, i.e. that it really is an image of something on the surface of Mars.
Once that is established, then you can begin considering just how facelike the thing on Mars is and what the implications of it are.