Having the power of seeing clearly; quick-sighted; sharp of sight.
source: Webster 1913
adjective satellite
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.
source: WordNet 3.0
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.