51.   Early on, when it was still hard to tell the differences between hoaxes and real threats, the confusion stimulated more, and more disturbing, coverage.

52.   Election officials can tell the difference between the two because the advance ballot is blue while the true ballot is beige.

53.   Grip it like any other shifter and, unless you are looking at it as you shift, you cannot tell the difference.

54.   He said he could tell the difference between students admitted purely on their scores and those helped by their race.

55.   Highway bandits are so close to some politicians that it is hard to tell the difference between them, and barely worth the trouble.

56.   How can one tell the difference between real science and pursuits that may have the form, but generally not the content, of science, like parapsychology?

57.   How can you tell the difference between good public relations and crass marketing?

58.   How can he ever tell the difference?

59.   How to tell the difference?

60.   How do you tell the difference between a violinist and a dog?