Where in the rulebook does it explain how to use Wises?

In Why I Love the Burning Wheel, at about 39 minutes in the author explains that Wises can be used either to ask for information about the world or to make stuff up wholesale.

Consulting the rulebook, I can see on page 309 that Wises are described as skills through which a character can call upon their knowledge of the world, but I can’t find any reference to the skill allowing you to actually help shape that world.

Can someone direct me to the part of the rulebook that goes into that? Thanks!