As humans, we base our decisions on our knowledge about the world, which we have acquired through education, reading, reflection, conversation, etc. We all have substantial commonsense knowledge as well as knowledge about how our world is structured, which guides us in our daily lives, helps us to take decisions, etc.
Cimiano, P, Völker, J, & Buitelaar, P. (2010). Ontology construction. In Handbook of Natural Language Processing, Second Edition (pp. 577–604).