21.   The rising porn tide lifted all boats.

22.   The rising tide is lifting Boatscape.com, a fledgling Boston company that hopes to serve the boating community.

23.   The rising tide lifted all boats, including Citibank and E-Trade, which improved their satisfaction scores a few notches.

24.   The rising economic tide may not lift all the boats, but it is swamping challengers who aim to dump incumbents overboard.

25.   The rising tide lifted all boats.

26.   The rising tide lifted the boats, but some were lifted far more than others.

27.   The rising economic tide has not lifted all boats.