3V0720.02 [joke… knock-knock]: verbally formulated classification based on a single exemplar. 1/12/80)

We all sat at table this evening. Either Gretchen and I teased and all of
us laughed, Peggy too. I believe I asked her what she laughs about (the
joke was one she could not comprehend). Peggy responded, “joke…”
and then continued “knock-knock.” Here is a clear example of verbally
formulated classification.

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