Conundrum of the Day

Red hasn’t posed one in a while so here goes.  Today’s conundrum is also known at the Thursday Hanging Paradox.

A condemned prisoner is told on Sunday that he will be hanged at dawn one morning in the next seven days and that it will come as a complete surprise.  At first, understandably depressed, he weeps, but then beings to ponder the situation for a moment.  He suddenly realizes that they cannot hang him next Sunday because that is the last of the 7 days and thus it would not be a surprise.  He keeps going.  If they cannot hang him on Sunday, then they cannot hang him on Saturday because Sunday is out as a possible hanging day and thus, hanging him on Saturday would not be a surprise either.  Extending this logic through the week, he concludes that they cannot hang him at all.  Of course, he is totally surprised when he is taken out of his cell on Thursday and hanged at dawn.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s