I know Santa Claus isn't real, but if someone asked me how to falsify the theory that he DOES exist, I'd be stumped.

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    Assuming that somenone cal speak reasonably of the "theory of Santa Claus", we have to proceed as with any other theory (e.g. general relativity, balcj holes). According to the theory, we have to formulate testable consequence of it and then set up tests and experiments: if the results are positive, we have support for the theory; if negative, we have a confutation of it. Apr 14 '19 at 11:33
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    In this case, the test is very simple and has been repetead many many times : wait awake at midnighy of 24 Dec and see who leave the boxes with the Christmas gifts under the Christmas tree. Apr 14 '19 at 11:35
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    Can you formulate your Santa Claus theory, please ? Apr 14 '19 at 11:53
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    "Santa Claus, also known as Saint Nicholas, Kris Kringle, Father Christmas, or simply Santa, is a legendary figure originating in Western Christian culture who is said to bring gifts to the homes of well-behaved ("good" or "nice") children on Christmas Eve (24 December) and the early morning hours of Christmas Day (25 December)." Apr 14 '19 at 11:54
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    There is no theory to be disproven here, only a claim.
    – Cell
    Apr 14 '19 at 12:00

"Falsification" came as a replacement for the earlier criterion of "verification". Exhibiting an item "verifies" that it exists. A problem is apparent with general/universal statements such as "all electrons are identical". No reasonable way is seen except to shift the burden of proof: a unique different electron would falsify the claim, but its discovery is left to the opponents. Thus falsification is for theories which make sweeping statements. Existential claims are to be accepted only when their object is exhibited. It is the people claiming that X (Santa, the multiverse, etc) exists who bear the burden of proof.

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