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Summary

Cleaning up after an internet experiment, Leonard discovers a letter in the trash can. He and Sheldon had been invited to present some research they had done together at an academic conference. However, Sheldon disapproves of presenting research in person and says Leonard cannot go without him. Leonard defies him and says he will go and present the findings on his own. This causes a rift between the two which Penny tries to mend but accidentally ...

Episode Guide