Myths are stories, told from generation to generation, with the purpose to calm the soul for unexplained facts, also as dictate an expected behavior.
I found this great review from a TotC session where some blind-tests were made and they found out that:
- Vermouth and lime juice were acceptable if kept refrigerated ;
- Dry shake does add mouth feel to cocktails with egg.
I found this information very useful since I tend to keep away from buying vermouth for myself and also that pre-squeezed lime juice has a weeked shelf-life.