61.   We also might surmise that margarine manufacturers know their stuff.

62.   Varvatos knows his stuff, all right.

63.   Welcoming waiters and waitresses who know their stuff keep the room hopping and happy.

64.   With a lifetime of diner eating and a diploma from Ecole de Cuisine La Varenne in Paris, Boyle knows her stuff.

65.   You need to know that stuff, too.

66.   You know that stuff about players blocking out all sound when the place is going nuts?

67.   You know the stuff.

68.   You know stuff about tanks.

69.   You know that stuff?

70.   And the detailed bibliographies accompanying each essay prove these researchers know their stuff.