Sheldon: [after Leonard refuses to check a message from Stuart, assuming it's about Penny] You have to check your messages, Leonard! The leaving of a message is one half of a social contract which is completed by the checking of the message. If that contract breaks down then all social contracts break down and we descend into anarchy!
Leonard: It must be hell inside your head.
Sheldon: [pause] At times.
Leonard: It must be hell inside your head.
Sheldon: [pause] At times.
Sheldon : [after Leonard refuses to check a message from Stuart, assuming it's about Penny] You have to check your messages, Leonard! The leaving of a message is one half of a social contract which is completed by the checking of the message. If that contract breaks down then all social contracts break down and we descend into anarchy!
Leonard : It must be hell inside your head.
Sheldon : [pause] At times.
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