How to detect a two-way mirror

How can you tell when you are in a room, restroom, motel etc. with a mirror or a 2-way glass?

Here's how: 
A policewoman who travels all over the U.S. and gives seminars and techniques for businesswomen passed this on.

When we visit toilets, bathrooms, hotel rooms, changing rooms, etc., how many of you know for sure that the seemingly ordinary mirror hanging on the wall is a real mirror, or actually a 2-way mirror (i.e., they can see you, but you can't see them)? 

It is very difficult to positively identify the surface by just looking at it but, if you place the tip of your fingernail against the reflective surface and there's a GAP between your fingernail and the image of the nail, then it is a GENUINE mirror.

However, if your fingernail DIRECTLY TOUCHES the image of your nail, then BEWARE, FOR IT IS a 2-WAY MIRROR!

"No Space, Leave the Place" So remember, every time you see a Mirror, do the "fingernail test." It doesn't cost you anything. Remember: "No Space, Leave the Place"

Women:- share this with your girlfriends, sisters, daughters, etc.
Men:- Share this with your wives, daughters, girlfriends, etc

HOW TO DETECT A HIDDEN CAMERA IN ROOM

When you stay in a hotel, how do you know there is no room pinhole camera?When you travel or take a business trip, and stay in a hotel or a guest house or room you could unknowingly be photographed.

You can use this method to check your room :When you enter into the room, turn off the lights, and close the curtains, open your phone camera, do not turn the flash light on.

Turn around the room with your cell phone. When a red dot is found, that means that a hidden web camera is installed.If no red dots, the room is ok.

Please forward this message to your friends who travel a lot or take business trips..