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Only 150 of Your Facebook Contacts Are Real Friends - Scientific American

www.scientificamerican.com/article/only-150-of-your-facebook-contacts-are-real-friends

What Jamie wrote

Dunbar’s number proven again!

Study after study confirms that most people have about five intimate friends, 15 close friends, 50 general friends and 150 acquaintances.

This should be termed a law at this point.