21.   Hammering nails is such an elementary task that it would seem that no explanation is needed.

22.   Harvey feels McKay was endeavoring to explain something that needed no explanation.

23.   House painters need no explanation.

24.   I need an explanation.

25.   If you ever saw him play, this needs no explanation.

26.   If you need a more detailed explanation, we bring you linebacker Greg Biekert.

27.   In fairness, this focus on skin color needs some explanation.

28.   Looks of exhilaration needed little explanation as students compared experiences between track sessions.

29.   No other explanation is needed.

30.   No explanation was needed.