Schemata are interrelated and multiple conflicting schemata can be applied to the same information. Schemata are generally thought to have a level of activation, which can spread among related schemata. Which schema is selected can depend on factors such as current activation, accessibility, and priming.
Hornets will look for a sheltered location to make their nest, and such nests can be found under leaves, in tree branches, on windows, in attics, under rafters, inside abandoned buildings or vehicles, etc. Any space that is protected from the weather and undisturbed can attract hornets to nest.
Once a wasp nest is fully established (mid summer) it will be quite apparent where the nest entrance is, there will be a constant stream of wasps to and from the nest. In the case of common wasps, normally the actual nest is not visible, it will just be a hole in the fascia or soffit board or shed wall etc, the nest will be hidden away behind the visible entrance.