Reach for the nearest coin you have and place the coin flat on your palm. I don’t particularly care which side you have facing up at you. Ensure that you are looking at either ‘heads’ or ‘tails’. 

What can you see? 

You can only see one side of the coin and that will be the side of the coin you chose to have facing upwards in accordance with the instruction above. 

It does not matter what side you have facing you because the underlying point is that it is the only side that you can see. 

Consider for a moment what happens when you...