Premise: Macbeth ( [ məkˈbɛθ ] full title The Tragedy of Macbeth ) is a tragedy by William Shakespeare ; it is thought to have been first performed in 1606 . It was first published in the Folio of 1623 , possibly from a prompt book , and is Shakespeare 's shortest tragedy . Tragedy is the designation given to most tragedies written by playwright William Shakespeare .
Hypothesis: Macbeth is not by William Shakespeare.
Label: CONTRADICTION