I think this question asks if the arguments Lady Macbeth uses are based more on pathos or on logos. I agree completely with Janeyb--Lady M is a master of the emotional argument. Think of her response to Macbeth when, after much consideration, he tells her he's decided not to kill Duncan. She responds by asking him if the hope was drunk that he had earlier dressed himself in and suggests that if he could change that much in his ambition, so changeable and weak must be his love for her. Then she calls him a coward, and she attacks his masculinity, saying he would would be a man--more than a man, even, when he dares to do the deed. Then she says she would gladly have plucked her smiling baby from her nipple and bash its brains out before she would break a promise to him. There's not a whit of logic in this argument--it's aimed straight at the heart. Or something.