Noun
a law affirming that to continue after a certain level of performance has been reached will result in a decline in effectiveness
Source: WordNetThe whole conflict thus boils down to a question of degree. We of the minority see a law of diminishing returns in progress; our opponents do not. Aldo Leopold
The law of diminishing returns is something I really believe in. Thomas Keller
Other composers have taken this particular technique much further than I in the meantime, with the result that the Law of Diminishing Returns has begun to apply. Brian Ferneyhough
The one negative to horror is that it's always law of diminishing returns. When you go in the funhouse, the ride is never scary the second time. You will never have that pure experience as when you first watch it. Eli Roth
Unbounded morality ultimately becomes counterproductive even in terms of the same moral principles being sought. The law of diminishing returns applies to morality. Thomas Sowell