What one fool can do, another can. --

Related:

• What one fool can do, another can. --
  Ancient Simian...
• Only a fool can reproduce another
  fool's work...
• Freivald's Law:
  Only a fool can reproduce another fool's work...
• An engineer is a man who can do for a dime what any
  fool can do for a dollar...
• One enemy can harm you more than a hundred friends can do you good.
  German...
• Any fool can moderate,
  and many of them do...
• An engineer is an unordinary person who can do for
  one dollar what any ordinary person can do for two...
• Sometimes it is more important to discover what one cannot do,
  than what one can do. -- Lin...