He has been arguing in a circle; there is thus a see-saw between the hypothesis and the fact.

• Jack, could you take a look at my computer? It won't boot up.
• I'm on it!

The cab stopped, and out jumped a man in a coarse Petersham great coat, whitey-brown neckerchief, faded black suit, gambooge-coloured top-boots, and one of those large crowned hats, formerly seldom met with, but now very generally patronised by gentlemen and costermongers.

Wherefore let him that thinketh he standeth take heed lest he fall.