Negative returns: the point where we are not merely getting a smaller return on each additional investment, we are actually decreasing our overall output. For example, there is a point in writing where you start making a manuscript worse by working on it longer. The same can be said for composing a song, drafting a blueprint, preparing a legal argument, or writing computer code, along with many other endeavors. You are fatigued. Your judgment is impaired. Every ounce of extra effort you put in now is detrimental. It is an example of false economy to continue at this point.
