"One of the major failings of our educational system is the inattention paid to the role assumptions play in thinking. This means that as the products of the system, students are unlikely to have given this key topic any thought whatsoever. Instead, students blithely go through life in happy ignorance of the assumptions that form the foundation of their knowledge of themselves and the world around them." "Assumptions are presuppositions that make possible the thoughts and activities we construct based upon their presumed truth."
- Raymond S. Ruble, The Theory and Practice of Critical Thinking