When their salary depends on not understanding it A Quote by Upton Sinclair It is difficult to get people to understand something, when their salary depends on not understanding it. understandingwork
Economy of material and labor Whatever the comparative merits of [various bed framing methods], what is clear from Aristotle's Mechanica is that economy of material, and labor, was as much an issue in ancient times as it is now. Henry Petroski, The Evolution of Useful Things The requirements of economyThe art of not constructing simplicity