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?