stating a general principle and then presenting reasons in favor of adopting it showing that, in practice, the principle under consideration could not be uniformly applied demonstrating that a consequence that had been assumed to follow from the principle under consideration need not follow from it attempting to undermine a general principle by arguing that undesirable consequences would follow from it
It is often said that people should be rewarded for doing a given job in proportion to the effort it costs them to do it. However, a little reflection will show that this is, in fact, a very bad idea, since it would mean that those people with the least skill or natural aptitude for a particular task would be the ones given the most incentive to do it.
Which one of the following argumentative strategies is used above?