11. The artist Ren?Magritte illustrated the quality in his 1936 painting " Perspicacity ". 12. I believe that the true sign of perspicacity is being reluctant to make an actual weather prediction. 13. Cardinal Carter had intelligence and could see through theological, moral and social problems with great perspicacity . 14. His identification of many puzzling pieces were a testimony to his rare powers of observation and perspicacity . 15. Rule 9 was " De Perspicacitate Intuitionis " ( On the Perspicacity of Intuition ). 16. I mean, when's the last time you heard Mr . B's perspicacity saluted? 17. And members of the Dysautonomia Foundation, which has financed his work, are congratulating themselves on their perspicacity . 18. The sales may be a tribute either to van Wolferen's perspicacity or to the masochism of the Japanese public. 19. As Motion readily concedes, the biographies by Bate, Ms . Ward and Gittings treated many of these issues with equal perspicacity . 20. For sheer " lack " of perspicacity , the accolades are reserved for the questioner, who should have guessed this.