Final answer:
Lehman's Laws are principles understanding software evolution, not directly addressed in your provided materials, which focus more on natural and economic laws derived from empirical research and observation, such as Say's Law and Keynes' Law in economics.
Step-by-step explanation:
Lehman's Laws refer to a set of principles intended to understand the evolution and maintenance of software. Nonetheless, these laws seem to be absent from your materials, which focus on scientific laws and a few economic concepts such as Say's Law and Keynes' Law. Instead, your content deals with the way natural laws are derived from observations, hypotheses, and experiments and how these are universally applicable. These scientific laws are uncovered through rigorous scientific method and detailed data collection, as seen in the work of Kepler and Newton.
In the context of economics, Say's Law primarily applies to the long run and posits that supply creates its own demand. Keynes' Law, on the other hand, states that demand creates its own supply and is usually referenced concerning the short run. Neoclassical economists tend to favor Say's Law. In the AD/AS (Aggregate Demand/Aggregate Supply) diagram referenced in your materials, the horizontal axis typically represents the output or real GDP, while the price level is shown on the vertical axis.