The Heineken Uncertainty Principle:

Related:

• The Heineken Uncertainty Principle:
  You can never be sure how many beers you had last night...
• You can never be sure how many beers you had last night.
  The Heineken Uncertainty...
• The one thing you can never be sure of is
  uncertainty...
• Sex is like snow...
  You never know how many inches you're going to get...
• Sex is like snow; you never know how many inches you are going to get or how long it is going to last.
  Murphy's laws on...
• You obviously had too much to drink again last
  night...
• How many programmers -- does it take to change a light bulb?
  One, but you can never change it back again...