The Definition text for ElementDefinition.definition indicates "(Note: The text you are reading is specified in ElementDefinition.definition)."

The Definition text for ElementDefinition.comment indicates "(Note: The text you are reading is specified in ElementDefinition.comment)."

Both statements cannot be true. The note for ElementDefinition.comment should be moved down to the ElementDefinition.comment "Comment".

(Also, the period outside the parentheses of both notes should be inside the parentheses, like here.)