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The idea is that some the time, it's not the book, but just a random small picture of Waldo. Since you don't know if it's the book under there or not, you don'
by skj 11y ago
The idea is that some the time, it's not the book, but just a random small picture of Waldo.
Since you don't know if it's the book under there or not, you don't know if this example is a "control".
The proportion of times that it is the book has to be the same as the odds that you could randomly guess where Waldo is, I think.
- edanm 11y agoNo, that's wrong. The book always has to be under there, otherwise you aren't proving anything (or at least, the odds are worse). The idea is that your counterparty cannot ever ask for both the book under there and to see Waldo, so they never know where the book is. You can spin the book around under the cardboard to put it in arbitrary locations, therefore just seeing the Waldo doesn't help.