Same with the witch trials here in Airstrip One a few hundred years ago.

The Sketch from "The Holy Grail" by monty python

Peasant 1: A witch! We have found a witch! Can we burn her?

Belvedere: How do you know that she is a witch?

Peasant 2: Because she looks like one!

Witch: I am not a witch! I am not a witch! They dressed me up like this, and this is not my nose it is a false one!

[Belvedere pulls off the false nose and opens his helmet]

Peasant 1: Well, we did do the nose, and the hat.

Peasant 2: She has a wart.

Belvedere: Why do you think that she is a witch?

Peasant 2: Well, she turned me into a newt.

[Belvedere gives him a disbelieving look]

Belvedere: A newt?

[Silence]

Peasant 2: Well I got better.

Peasant 3: Burn her anyway.

[Yells of "Burn her!"]

Belvedere: There are ways of telling whether she is a witch. Tell me, what do you do with witches?

Peasants: Burn them!

Belvedere: Now, what do burn besides witches?

Peasant 3: More witches! [receives a punch from Peasant 1; silence]

Peasant 2: Wood?

Belvedere: So, why do witches burn? [more silence]

Peasant 2: Because there made of wood?

Belvedere: So, how do you tell if she is made of wood?

Peasant 3: Build a bridge out of her!

Belvedere: Ah, but cant you also build bridges out of stone?

Peasant 3: Oh, right.

Belvedere: Tell me, does wood sink?

Peasant 1: No, it floats.

Belvedere: What also floats in water?

[lots of yelling and many wrong and random answers including very small rocks]

King Arthur: A duck!

Belvedere: Exactly!

Peasant 2: So if she weighs as much as a duck she is made of wood.

Belvedere: And therefore?

Peasants: A witch!

Belvedere: We shall use my largest scales.

[Having been revealed to weigh the same as a duck, therefore proving her a witch, the crowd goes insane]

Witch: It's a fair cop.