The man who appears at a party or a reception in a not-too-clean plaid shirt, without tie, or at a business meeting with a two-days growth of beard will never be mistaken for an absent-minded genius.

• 有人若穿着不太干净的方格衬衣，不系领带出席聚会或招待会，或是两天不刮胡子出席商务会议，别人决不会把他错当成是心不在焉的天才。