A reproduction of the second and fourth in a series of ten seminars given by Professor Bruce Archer in the academic year 1976-7 under the title A Philosophy for Design. The paper explores the idea that there is a third area of human knowing, after literacy and numeracy, which we might call 'wroughting and wrighting'. It makes the case that this third area be given proper esteem and resources at secondary-school level, and be considered worthy of study at the level of higher education.