10. You don’t know if Pat is the receptionist. If not, then add Pat to the
list. You also don’t know if the man waiting in the chair and Jim are
the same person.
E. VARIATION: Have each class member complete the test independently.
Then lecture about collective inferential error. Have the class members
congregate in groups and examine their answers on the test together as
a group. Change any answers deemed incorrect. Correct the test. Is
there any error correction when working in groups following the
lecture? Another variation: Have half the class work on the test as
individuals without discussion of any sort and have half the class work in
small groups on the same test (out of earshot from the individuals).
Compare scores of individuals (average and range) with the group scores.
III. Excerpt from movie, Being There.
A. Show 6-minute clip from Being There, starting approximately 35
minutes into the film. The scene depicts a meeting between Ben, an
older wealthy industrialist (Melvyn Douglas), Bobby, the President of the
United States (Jack Warden), and Chauncey Gardner (Peter Sellers).
Chauncey is a guileless gardener with a mysterious past. His only
knowledge of the world comes from watching television and working in
a garden. Ben has taken Chauncey in but has no idea of his background
or from whence he came. He does not perceive Chauncey to be simple-
minded though; in fact, quite the opposite. Ben thinks Chauncey is a
commonsense sage.
B. Begin the clip when Ben and Chauncey enter Ben’s cavernous library
and Ben says, “Where the hell is he?” End the clip when Chauncey says,
“Yes, I’m glad he came, Ben.”
C. The President and Ben mistake Chauncey’s literal comments about a
garden for a metaphor on economic policy. It is a wonderful, and
quite amusing example of inferential error. They infer figurative
profundity from literal mundaneness.
IV. “False Dichotomies” exercise
A. Purpose: To help students understand what a false dichotomy is and why
it might be a problem for group decision making.
B. Time required: 5-10 minutes
C. Instructions
1. Have students take out a sheet of paper and a pen or pencil.