"You already know" advice amplifies your existing belief. It's about taking a 60% confidence guess to a 95% confidence guess. Stated like that it becomes obviou

"You already know" advice amplifies your existing belief. It's about taking a 60% confidence guess to a 95% confidence guess. Stated like that it becomes obvious that it's appropriate if someone vaguely suspects the correct thing, but dangerous if they vaguely suspect the wrong thing.