perspicacious

Adjective

• mentally acute or penetratingly discerning
  • too clear-eyed not to see what problems would follow
    
  • chaos could be prevented only by clear-sighted leadership
    
  • much too perspicacious to be taken in by so spurious an argument
    

• acutely insightful and wise
  • much too perspicacious to be taken in by such a spurious argument
    
  • observant and thoughtful, he was given to asking sagacious questions
    
  • a source of valuable insights and sapient advice to educators
    

Related words

• Synonyms: 
  clear-eyed , clear-sighted , sagacious , sapient