You Going Somewhere with This, Prof?

Professor: Who can tell me the difference between a birch tree and a beech tree?
Student: A beech tree's got lighter bark.
Professor: But otherwise there's no difference?
Student: I dunno 'bout the leaves or anything, but when you buy furniture from IKEA, beech wood's always lighter.
Professor: But could you identify a birch tree from a beech tree if you saw one on campus?
Student: If I cut it down, maybe.

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