How Judge Taylor can tell that Mayella and Bob are lying

He can tell that these two people are lying because of the Mayella sweats, and stumbles over words. He can tell that she feels guilty about doing this to Tom, but that if she doesn't then her father will beat her again. Bob is just plain lying, and he can tell because of the proof that Atticus and Tom gives and their thoughts about what has happened. Atticus is very well worded and he is very much attempting to prove that Tom is not guilty because of how much feeling he is giving in his thoughts and how much he is sweating.