NMR - coupling of chemically equivalent protons In Klein's Organic Chemistry 3rd Edition page 671, it states


  This observation, called the n + 1 rule, only applies when all of the neighboring protons are chemically equivalent to each other.


However, in the following page, it states


  Equivalent protons do not split each other


The first statement infers that for the n + 1 rule to be valid, the protons must be chemically equivalent - inferring that equivalent protons can couple, while the second statement directly contradicts this.

Could my misunderstanding be clarified?
The "n+1" rule refers to a situation where you have a proton of type A with $n$ protons of type B next to it. Proton A's signal will be split $n+1$ times by the B's. However, none of the B's will split each other because they are equivalent.