For example, if the spark plugs were removed from a car's engine and put in the back seat, an inventory of the parts would show the car intact. To understand why the car could not fulfill its purpose, one would have to study the relationship of the spark plugs to the rest of the engine. Temperature news is sent by the environment to the thermostat. In other words, this system selects for its own failure. Ultimately, the monetary system fails.
Many Greshamite systems exist in our society.
For example, a pesticide kills all but resistant pests. As this process continues, increasing percentages of the pests are resistant to the pesticide. Positive feedback occurs as pesticide applications are increased to offset increasing resistance. Ultimately, the pesticide fails. This same process occurs with antibiotics, producing resistant diseases.