The phrase 'rational existence' is correct and usable in written English.
You can use this phrase when you are trying to describe a life or existence that is based on sound reasoning and good judgment. For example, "John's life was one of rational existence, as he always carefully weighed his decisions before acting."
For the Deist, a very few religious truths sufficed, and they were truths felt to be manifest to all rational beings: the existence of one God, often conceived of as architect or mechanician, the existence of a system of rewards and punishments administered by that God, and the obligation of humans to virtue and piety.
Indeed, it has no rational justification for existence, except that it is, from the purely pictorial standpoint, probably the finest urban silhouette on a great scale one can behold anywhere in the world.
We're talking about purchases that are about as rational as the existence of Las Vegas.
She furthermore holds: "A person, in one Kantian view, is a free and rational agent whose existence is an end in itself, as opposed to instrumental.
Catharine MacKinnon appeals to Kant's idea of persons as ends to explain the moral problem of pornography: "A person, in one Kantian view, is a free and rational agent whose existence is an end in itself, as opposed to instrumental.
The rational for the existence of distinct subsets of receptors containing different NR2 subunits has been the subject of much controversy and remains poorly understood.
Aristotle's speculations began a tradition that later came to be known as natural theology the attempt to provide a rational demonstration of the existence of God based on features of the natural world.
Take the whining chorus in the media about Mike Tyson: "As long as I can remember, people have been hating boxing because something in the rational, corporate vision of existence doesn't like people hitting each other," he says, the gravel voice accelerating like an engine.
Thus, it reduces the body to a material (biological) reality, and it denies the existence or rational validity to everything that does not fall under such epistemological consideration.
This suggests that he thinks that in taking "all reality" to mean or include "existence," the rational theologist begs the question, and already posits the analytic connection between the concept of the ens realissimum and necessary existence.
