The part of ECON101 that I remember most distinctly is that we kept doing supply and demand curves. We kept doing that until the professor was absolutely sure

The part of ECON101 that I remember most distinctly is that we kept doing supply and demand curves. We kept doing that until the professor was absolutely sure that everyone knew what happened when supply was infinite, or when demand was inelastic, or when supply was a hard fixed quantity but the needs of the market kept growing. It's really basic stuff, that's why it's a 101 course. However the realities of that kind of course should be remembered and applied to things like "rent control" that acts as an outside influence on where the curves meet, but doesn't actually change the supply or demand directly. Knowledge that would help with assessing the possible intended and unintended results of different laws.