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Viliam comments on Open thread, Nov. 23 - Nov. 29, 2015 - Less Wrong Discussion

5 Post author: MrMind 23 November 2015 07:59AM

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Comment author: Viliam 25 November 2015 09:33:42AM *  1 point [-]

However, if you're predicting the next flip in a finite series of flips that has already occurred, it's actually more likely that you'll alternate between heads and tails.

...because heads occurring separately are on average balanced by heads occurring in long sequences; but limiting the length of the series puts a limit on the long sequences.

In other words, in infinite sequences, "heads preceeded by heads" and "heads preceeded by tails" would be in balance, but if you cut out a finite subsequence, if the first one was "head preceeded by head", by cutting out the subsequence you have reclassified it.

Am I correct, or is there more?

Comment author: gjm 25 November 2015 02:13:29PM 1 point [-]

I don't think this is correct. See my reply to AstraSequi.

(But I'm not certain I've understood what you're proposing, and if I haven't then of course your analysis and mine could both be right.)

Comment author: Viliam 25 November 2015 02:38:51PM *  0 points [-]

Oops, you're right.

Using the words from my previous comment, now the trick seems to be that 'heads occurring separately are on average balanced by heads occurring in long sequences' -- but according to the rules of the game, you get only one point of reward for a long sequence, while you could get multiple punishments for the separately occuring heads, if they appear in different series. Well, approximately.