Related:

• The three most important parts of a stove: lifter, leg, and poker.
• The most important leg of a three legged stool is the one that's missing.
  -- Lyall's Fundamental Observation ... in the direction of maximum harm. -- Lyall's Addendum...
• The most important leg of a three legged stool is the one that's missing.
  Lyall's Fundamental Observatio...
• I've got some cocoa on the stove. Who wants imitation marshmallows?
  -- Marge, "Three Men and a Comic Book...
• All syllogisms have three parts, therefore this is not a syllogism.