Pub Logic

A warped method of reasoning and debating technique encountered primarily in the pub, whereby common sense and prior knowledge are used at the expense of actual evidence. Resultant ideas, theories and conclusions range from the ridiculous to the surprisingly ingenious.

Tom: "Why is the music playing from the jukebox so crap?"
Dick: "I reckon they deliberately play crap songs, in order to make you pay to put on decent songs."
Harry: "That's a bit of pub logic!"