Now we need to understand what implications those positions have and where they contradict.

They don't contradict, they're simply methods with different tradeoffs for different people. My statements are aimed at people who don't enjoy being under pressure; Davis and Yvain's methods will work well for people who thrive under pressure. Yvain's method has some crossover with mine, in that I predict he will be far less successful with an oath that does not involve the contemplation process. That is, I attribute the majority of his success to the pre-oath contemplation, and very little to the oath itself, or the penalties attached to it. (And I consider the attachment of penalties to be dangerous as well as unnecessary.)