To Redefine or to Dereify? That is the question

A kind of issue that arises again and again in philosophy is whether it makes more sense, or would have better consequences, to revise a concept or else to deny its instantiation. An example of the former is the way the notion of what a planet is has altered drastically through the ages. At one time it referred simply to the wanderers in the heavens (its literal meaning), that is, those celestial entities that moved relative to the “fixed” stars. This included not only objects that we still call planets but also the Sun and the Moon. Then Aristotle proposed that they were holes in a celestial sphere that allowed light from the empyrean to shine through. Now we conceive them as large spheres orbiting a star, and even our own Earth is numbered among them. 

An example of the latter is the ether, which was once thought to be a substance that filled space and provided the medium through which light waves traveled, just as water provides this service for ocean waves and air for sound waves. But advances in physics made the analogy obsolete, and so, rather than somehow revise the concept to fit the new ideas, ether was simply dropped from the inventory of existing things. The concept still exists (so to speak), but it is no longer thought to have any instantiation in reality. 

In this way existence is shown to be dependent on definitions or analyses. For by choosing to revise a definition or else to retain it, we can determine whether something continues or ceases to exist, respectively.[1] So when philosophers (like scientists) discuss concepts, there is sometimes the question of whether various inadequacies in their application counsel simply revising the concept or else ceasing to make use of it. For me in recent years the casus belli has been morality. Most philosophical ethicists are realists about morality, who nevertheless are forever proposing reanalyses of the concept. Indeed, it is the commitment to morality’s existence that inspires these endless refinements. 

For me the refinements are like the ever increasing number of epicycles needed to salvage the Ptolemaic universe, with the Sun at its center. Just so, by this time I see the whole effort in ethics to “save” morality as pretty much the tail wagging the dog; for isn’t the nobler aim to know what the universe is really like rather than to make it fit the Procrustean bed of a familiar concept? Thus I advocate the elimination of morality (which is actually a set of concepts, including also moral right and wrong and moral good and bad and moral responsibility and desert and so on) from our conceptual repertoire for describing how to live and how to act in the practical circumstances of life.


[1] Actually that “respectively” needs to be qualified. It apples properly to a type of thing or to a mass noun, such as a planet or ether (respectively). But when it comes to particulars of the type, the reverse is true. Thus, it was revising the definition of “planet” that made a particular planet cease to exist in our solar system, namely, Pluto.

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