While true love is the subject of many tales, the metaphysical question of its foundation is rarely addressed. One interesting way to explore this question is to bring in another popular subject of fiction, that of possible worlds. Imagine, if you will, a bereaved lover seeking to replace their lost love by finding an exact counterpart in another world. This raises the issue of whether it is rational to love the metaphysical counterpart of someone you love. I contend that this is just as rational as loving the original person and will argue for my case by using appeals to intuitions and analogies. In the interest of fairness, I will also consider and refute the transcendent argument for true love.
The metaphysics of Rick & Morty includes the existence of an infinite number of alternative worlds, each of which with its own Rick and Morty. The Rick and the Morty that are, one presumes, the true stars of the show have been forced to abandon their original reality a few times. However, they always end up living with “their” family (Beth, Summer and sometimes Jerry). While Rick often purports not to care, he repeatedly shows that he loves “his” daughter Beth and granddaughter Summer. However, as he and Morty themselves know, the Beth and Summer of their adopted world are not their Beth and Summer. They are daughter and granddaughter of the Rick of that world—a Rick who is (typically) dead.
CW’s The Flash show also makes use of the multiple world plot device as well, one that dates to the early days of comics. The DC comic universe features a multitude of different earths, most notably Earth 1 and Earth 2. Earth 2 was the home of the original Batman, Superman and others—it was used to maintain the timeline in which, for example, Superman was on earth in the 1930s. In a series of episodes of the TV show The Flash, Barry Allen (the Flash) travelled to Earth 2 and met the counterparts of people he knew and loved on his world, most especially his beloved Iris. On Earth 2, the normal Barry Allen 2 was married to Iris and Barry Allen 1 (from Earth 1) pretended to be Barry Allen 2 and was rather obsessed with her and her father, despite being explicitly told that the people of Earth 2 were obviously not the same people as those of Earth 1.
While people tend to feel how they do for no rational reason, there is a rather interesting question as to whether it makes sense to love someone because they happen to be the counterpart of someone you love. While this would be an interesting matter for psychology, the metaphysical aspect of this case is a question of whether the counterparts are such that it is rational to love or care about them because they are metaphysical counterparts of someone you love or care about.
For the sake of the discussion that follows, consider the following sci-fi scenario: Sam and Kelly met in graduate school, fell madly in love and were married shortly after their graduation. They were both hired by Kalikrates Dimensional, a startup dedicated to developing portals to other dimensions.
During an experiment, Sam was pulled into the blender dimension and ejected as a human smoothie. Unfortunately, he had neglected to keep up his premiums with Life Ensurance and had no backup. Distraught, Kelly considered cloning him anyway, but decided that without his memories and personalities, it would not be Sam.