There are ways of telling whether she is a witch. Are there? Oh well, tell us. Tell me....

Sir Bedevere: There are ways of telling whether she is a witch. Peasant 1: Are there? Oh well, tell us. Sir Bedevere: Tell me. What do you do with witches? Peasant 1: Burn them. Sir Bedevere: And what do you burn, apart from witches? Peasant 1: More witches. Peasant 2: Wood. Sir Bedevere: Good. Now, why do witches burn? Peasant 3: ...because they're made of... wood? Sir Bedevere: Good. So how do you tell whether she is made of wood? Peasant 1: Build a bridge out of her. Sir Bedevere: But can you not also build bridges out of stone? Peasant 1: Oh yeah. Sir Bedevere: Does wood sink in water? Peasant 1: No, no, it floats!... It floats! Throw her into the pond! Sir Bedevere: No, no. What else floats in water? Peasant 1: Bread. Peasant 2: Apples. Peasant 3: Very small rocks. Peasant 1: Cider. Peasant 2: Gravy. Peasant 3: Cherries. Peasant 1: Mud. Peasant 2: Churches. Peasant 3: Lead! Lead! King Arthur: A Duck. Sir Bedevere: ...Exactly. So, logically... Peasant 1: If she weighed the same as a duck... she's made of wood. Sir Bedevere: And therefore... Peasant 2: ...A witch!