balking, balky, bigoted, bulldogged, bulletheaded, bullheaded, case-hardened, dogged, dogmatic, down-to-earth, earthy, fanatic, hard-boiled, hard, headstrong, hoaxproof, intolerant, matter-of-fact, mulish, not born yesterday, obstinate, opinionated, overzealous, persevering, pertinacious, pigheaded, positivistic, practical-minded, practical, pragmatic, rational, realist, realistic, reasonable, restive, sane, scientific, scientistic, secular, self-willed, sensible, set, sober-minded, sober, sophisticated, sound-thinking, sound, stiff-necked, straight-thinking, strong-willed, strongheaded, stubborn, sulky, sullen, tenacious, tough-minded, uncooperative, uncullible, undeceivable, undeludable, undupable, unfoolable, ungullible, unhoaxable, unideal, unidealistic, unregenerate, unromantic, unseduceable, unsentimental, willful, wise, worldly