• All trousers are pants.
  • All jeans are pants, but some jeans are not trousers. (White ones.)
  • Some slacks are trousers, but no slacks are jeans.
  • Some shorts are jeans, but not pants, and never slacks.
  • Chaps do not figure into the equation.
  • A slack cannot be a jean, but a trouser can be a slack.
  • Some chinos are khakis, but all khakis are on sale.
  • Yoga pants are not pants; yoga pants are tights; tights are not pants.
  • Tights are tight, but pants are pant.
  • In matters of protocol, Bermudans may view shorts as slacks, but no one else may.
  • On Tuesdays, everything is reversed.