• man of brains, man of insight, man of understanding, whiz
• he goes for a clever man
• she is clever and pretty to boot
• a word to the wise is sufficient
• dead to reason, there is no reasoning with him
• a word to the wise is sufficient
• a word to the wise is sufficient
• astutely, prudentially, prudently, shrewdly
• astuteness, brightness, discrimination, prudence, shrewdness
• argumentative, discursive, smarty