Agree. Also would say that if you question somebody in the wrong tone of voice or are vehement enough you can make anyone question a decision they have made.

Agree. Also would say that if you question somebody in the wrong tone of voice or are vehement enough you can make anyone question a decision they have made. Here's an example. You do research and find what you think is the cheapest airfare for a particular destination at a price of $340 USD by checking all the usual suspects. And more. Someone else who you respect says "now are sure that that is the cheapest price and that a fare of $300 isn't out there?" You say "yes" but they persist and say "you are absolutely sure right?" You say yes. They say "ok will you bet me $500 are you that sure? All the sudden you are going to 2nd guess and feel that you might have perhaps made a mistake or missed something. Certainly more than if someone just says "are you sure that's the best price"?. In the case of PG he was daring them and doing what I call "putting a hex" on something by being so vehement that he was right and they were wrong. And that they were going to suffer the consequences.