Marvin, who lives in San Francisco, has been asked to host a teenage alien, Regor, as part of an intergalactic exchange program. Marvin is sure that Regor would love to experience the adventure of sailing, but decides he should introduce the concept of a “sailboat” first. Marvin begins by sharing the dictionary definition of a boat: “a small vessel propelled on water by oars, sails, or an

engine.” The primary problem with this definition is that it ____.

a. ?is broader than the information Regor needs to identify sailboats
b. ?does not provide a good way to think about the category’s variability
c. ?excludes many category members that should be included
d. ?provides a checklist with too many exceptions

ANSWER:
a