When this home video of two young twins appearing to talk to each other in a language unfamiliar to any outsiders was released, it was an instant hit. People immediately posted comments claiming that this was proof that babies indeed have their own secret language, while others tried to guess what these babies were actually talking about. Before you come up with your own funny translation, however, let us look deeper into this issue where a simpler explanation awaits.
I'm sure there has been a time in everyone's life when they wished they were a twin. This is probably because people have the false idea that twins have a special way to communicate that nobody else can decipher. This idea is so well known that it even has its own name, cryptophasia. At first glance, this makes sense because you are likely to have a close bond with someone who you have spent your whole life with. However, this claim is no match for Occam's razor, one of the six principles of critical thinking, which proposes a simpler explanation. Since twins learn how to talk around the same time, it is likely that they make similar errors when speaking. As a result, the twins are able to recognize what the other one is trying to say while outsiders have no clue what the twins are talking about. Occam's razor has saved the day once again.
But is this babbling completely pointless? Absolutely not! Although it is true that babbling consists of intentional, yet meaningless sounds that come out of a baby's mouth, these noises are the first step in learning how to talk. The babbling allows babies to experiment with their vocal tracts and discover how to create different sounds.
By putting Occam's razor to use, we learned that it is unlikely that twins have a mysterious language that only they can comprehend. However, babbling should not be seen (or I guess heard) as an annoying, worthless noise because it plays an important part in helping an infant learn how to talk.
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Information courtesy of:
Psychology: From Inquiry to Understanding Textbook, pages 290 and 297