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Mind Games: Which Switch is Which?  
 
Which Switch is Which?
You are in an enclosed room. There are three identical light switches on one wall. One switch turns the porch light on and off, the other two switches are inoperative.
How would you determine which switch controls the porch light?

You cannot see the porch, or light, from inside the room. You are, however, allowed to make one trip to the porch before making a choice.

You may flip the switches as many times as you'd like, to any positions you'd like. The switches are accurately labeled 'on' and 'off.' The porch light switch, the light fixture and the light bulb are all in working order.
Solving this problem could take some time!
SOLUTION
 
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