cognitive psychology. PhD 
@wcrichton thank u for your great talk. I was listening but couldn't see the slides. Fortunately I did not need to read any of the programs because as soon as you said the error I knew what the program was
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Don’t you just love how easy it is to hear “this is a mutable” instead of “this is immutable”?
Thanks. Twitter will use this to make your timeline better. UndoUndo
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