Effective speakers make ________choices, identifying their goals and then determining how best to

Because signs are fallible all of the following guidelines must be used except: a. make sure a sign is not just an isolated instance

b. think about whether an alternative explanation is more credible. c. if you can find instances in which a sign does not indicate a particular event, you do not have a solid argument. d. use emotional appeal when relying on a sign.

A spectrogram is a visual picture of a person’s speech

a. True b. False