What is dingbats answer for RE over RE?

The answer to the dingbat puzzle "RE over RE" is "Splitting Hairs." This is because the Word "RE" is written above another "RE," representing "hairs" being split. Dingbats are visual Word puzzles where a combination of letters, symbols, and/or numbers represent a common phrase or saying. In this case, the visual representation of "RE over RE" is a play on the phrase "splitting hairs."