Ed Z, if I follow you correctly you're identifying that the suggested notes of a diminished chord are b3rd, b5th and 6th and the text identifies this, but then on the same line states that the notes include Eb and Gb, which of course are incorrect.

Moreover, for a B chord which is represented with sharps, the correct enharmonic description should probably use D natural and F natural.

In this case, I think you have found an error in the chord description.

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