What is the foil used for on the rear of this label?

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It's an RFID label similar to these:
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"Long Distance Passive Alien"... uh-oh! :eek:
 
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Thread 'Why do we spend so little time learning grammar in college?'

To some degree, this thread is inspired by PF user erobz's thread "Why do we spend so much time learning grammar in the public school system?" That's why I made a title to this thread that paralleled the title of erobz's thread. I totally disagree with erobz. I created this thread because the curriculum of grammar at Universities is a totally distinct topic from the topic of the curriculum of grammar in public schools. I have noticed that the English grammar of many ( perhaps most)...
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