walking stick

ignorant, illiterate, lowbrow, uneducated, uninformed, unintellectual, untaught, unthinking

absurd, asinine, balmy, cockeyed, crackpot, crazy, cuckoo, daffy, daft, dippy, dotty, featherheaded, fool, half-baked, harebrained, insane, kooky (also kookie), loony (also looney), mad, nonsensical, nutty, preposterous, sappy, screwball, silly, tomfool, unwise, wacky (also whacky), zany

fallacious, illogical, invalid, irrational, unreasonable