madness

noun
mad*ness \ ˈmad-nəs \
14th century{ds||1||}
  • the quality or state of being mad: such as
  • a state of severe mental illness —not used technically
  • behavior or thinking that is very foolish or dangerous : extreme folly

(a) method in/to one's madness

idiom
(a) method in/to one's madness \
  • good reasons for one's actions even though they may seem foolish or strange
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