User Tools

    To create and edit articles, please register and log-in

Main Menu : categories & index etc.

Main menu
Click categories to expand


A-Z listingplugin-autotooltip__plain plugin-autotooltip_bigA-Z listing

This is an alphabetical index of all content pages.


Other categories

Utilities

Contact
Register
Sandbox

Also see

Importance Ratings
News
Legal
Donate/Sponsor
Curator's rationale
AI Policy



Twitter feed 𝕏



Feeds + s.e.o. etc.
rss / xml feed
sitemap file
A-Z listing (archived)


Indexed under : Mathematics

Wikenigma - an Encyclopedia of Unknowns Wikenigma - an Encyclopedia of the Unknown

The 'Sleeping Beauty' problem

The 'Sleeping Beauty problem' is a philosophical / mathematical logic 'thought experiment' first devised (in a slightly different form) in 1990.

It currently has two different answers, one of which, presumably, must be wrong.

The Sleeping Beauty problem: Some researchers are going to put you to sleep. During the two days that your sleep will last, they will briefly wake you up either once or twice, depending on the toss of a fair coin (Heads: once; Tails: twice). After each waking, they will put you to back to sleep with a drug that makes you forget that waking. When you are first awakened, to what degree ought you believe that the outcome of the coin toss is Heads?

Source : Analysis, 60(2): 143-147, 2000. Adam Elga, MIT

It's considered that there are two possible answers : either ½ or ⅓ .

There are convincing mathematical arguments for both results - but only one can be correct. So far, more than 100 academic papers have been published on the subject (refs. ) But the mathematical and philosophical communities cannot currently agree on which is the right answer.

( Note that the origin of the problem came from a paper by Arnold Zuboff (Princeton / UCL) in Inquiry: An Interdisciplinary Journal of Philosophy 33 (1):39-68 (1990) entitled : One self: The logic of experience , and later re-presented as a PhD dissertation in 2009 )


    Please share this page to help promote Wikenigma !

Dear reader : Do you have any suggestions for the site's content?

Ideas for new topics, and suggested additions / corrections for older ones, are always welcome.

If you have skills or interests in a particular field, and have suggestions for Wikenigma, get in touch !


Or, if you'd like to become a regular contributor . . . request a login password. Registered users can edit the entire content of the site, and also create new pages.

( The 'Notes for contributors' section in the main menu has further information and guidelines etc.)

Automatic Translation

You are currently viewing an auto-translated version of Wikenigma

Please be aware that no automatic translation engines are 100% accurate, and so the auto-translated content will very probably feature errors and omissions.

Nevertheless, Wikenigma hopes that the translated content will help to attract a wider global audience.

Show another (random) article

Further resources :

DOKUWIKI IMPLEMENTATION DESIGN BY UNIV.ORG.UK DECEMBER 2023