A double proving of the feather and egg of Pavo cristatus leads to the central theme of truth and falsehood.
The significance of drug provings of a species with different source substances and potencies is discussed using the example of the peacock. A comparison of the proving symptoms of feather and egg shows striking parallels. A brief case report finally presents the practical application of the core theme.
KEYWORDS: drug proving, Corvus splendens, egg, feather, idiosyncrasy, migraine, Pavo cristatus, peacock, Solanaceae, birds
