TobyBartels comments on The Santa deception: how did it affect you? - Less Wrong

21 Post author: Desrtopa 20 December 2010 10:27PM

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Comment author: TobyBartels 22 December 2010 08:17:39AM 3 points [-]

I told my younger sibling that Santa Claus was real:

  • Santa is the person who brings us the presents.
  • Our parents bring us the presents.
  • Our parents are real.

Therefore, Santa Claus is real.

I don't remember how I found out the truth, but this is how she found out, when she asked me.

Comment author: Roehamster 23 December 2010 07:28:35PM 0 points [-]

Clearly in the presence of experts, I'm afraid to suggest that step four in your logic ought to read: "Therefore our parents are Santa". Am I missing something?

Comment author: TobyBartels 23 December 2010 07:36:51PM *  0 points [-]

It's all right; the classical syllogisms only take two premises to one conclusion, whereas here I want to take three premises to one conclusion. So classically, this requires two steps; the intermediate step can either be that the person who brings us presents is real or that our parents are Santa. On the other hand, it is still a valid syllogism all at once, a generalisation of the classical ones.