Telephone numbers are exactly seven digits long, which is consistent with

Question

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The fact that telephone numbers are exactly seven digits long is consistent with our short-term memory capacity, which is generally considered to be around seven items (plus or minus 2). This suggests that telephone numbers are structured in a way that can be easily held in short-term memory, without the need for additional chunking or other mnemonic strategies.

Telephone Numbers Are Exactly Seven Digits Long, Which Is Consistent