Two Strangers enter a pub.Yhe publican asks them what they would like.First man says "I'll hava a bottle of stout",and puts $2 down on counter.
Publican:"Guinness at $2 or Jubilee at $1.50?" First man:"Jubilee".
Second man says "I'll hava a bottle of stout,"and puts $2 on the counter,without asking him, the publican gives him Guinness.The second man is not a regular customer,nor did he give any indication as to what he wanted.
How therefore did publican know?