How to tell if a mirror is one-way glass

Wikihow has five methods of determining if a mirror is actually one-way glass, the kind used by government snoops and perverts. (Is there a difference?) My favorite is method number five: break the glass. Here’s the “fingernail test”: Perform the fingernail test. While not completely accurate, you can use your fingernail to determine if the … Continue reading How to tell if a mirror is one-way glass