- What is a paradox?
- What is paradoxical?
- Paradoxes of life
- Fermi paradox
- Epicurus paradox
- Twin paradox
- Time travel paradox
We explain what a paradox is, what are considered "paradoxes of life" and examples of famous paradoxes, such as time travel.
What is a paradox?
A paradox is an idea, fact, or proposition that contradicts the logic or violates common sense. The word paradox It comes from the Latin paradox, which literally means "contrary to common opinion." It is also called antilogy. It should not be confused with sophistry, which is only apparently valid reasoning.
They are common grounds of philosophical or logical debate, since paradoxes often lead to dead ends of logic. They are often formulated as a way of transmitting some conceptual complexity in a specific field of knowledge, the resolution of which escapes the traditional way of learning. thought.
We can talk about the following types of paradox:
- True paradoxes. Those that are verifiable, but that have an air of absurdity or contradiction to the terms themselves.
- Antinomies. Paradoxes whose result contradicts the premises from which it comes, despite the fact that its deductive methods they are perfectly valid.
- Definition antinomies. Of literary use for the most part, they are based on ambiguous definitions, or methods Illustrative thought lines regarding a key sense.
- Conditional paradoxes. Propositions that acquire a paradoxical character as one tries to solve them, either because there is a lack of information for its resolution or because it is simply impossible.
It is also usual to categorize paradoxes by the area of knowledge to which they concern: paradoxes math, paradoxes in physical, etc.
What is paradoxical?
By extension, all situations, events or events are considered paradoxical. propositions that contain within them an insoluble, ironic situation, contrary to logic or challenging of common sense.
We can say that a situation is paradoxical, for example, when in it we are immersed in conflicts whose resolution makes them worse, or when the pursuit of our desires makes them, precisely, unattainable.
Paradoxes of life
The “paradoxes of life” are often spoken of, to refer to the fact that people frequently find ourselves in paradoxical, ironic situations or without an apparent solution. In them, doing the obvious complicates what it is supposed to solve even more.
There is no "official" or definitive corpus of these paradoxes of life, but rather popular formulations, spoken by the people. They are used as ways of thinking about life and its arbitrariness, in the "logic" of life. life, that is, as a form of teaching with respect to what, paradoxically, one cannot learn to foresee.
In the following points we will see some famous paradoxes from different fields.
Fermi paradox
It is known with this title to the apparent contradiction that exists between the high probability that intelligent civilizations exist in other planets and solar systems (given the size of the Universe) and the total absence of evidence in this regard that we humans have to this day.
Who first formulated this paradox was the Italian physicist Enrico Fermi, in 1950, in the middle of an informal conversation, while working in the United States.
Perhaps due to the pessimism that existed at that time of the Cold War and possible conflict nuclear, Fermi answered his own question that, along with the development technological In order to make space travel effective, civilizations also developed the technological potential to annihilate themselves. Thus, he predicted the humanity an unpromising future.
Epicurus paradox
Also known as the Problem of Evil, this paradox of sorts philosophical or religious it contains the difficulty that exists to reconcile the existence of evil, suffering and injustice in the world, with the supposed existence of an omniscient and all-powerful deity, who is also benevolent, as posited by classical theism.
This paradoxical approach is based on four elementary questions:
- Is it that God wants to avoid evil, but cannot? So it is not omnipotent.
- Is it that God is able to do it, but does not want to? Then it is not benevolent.
- Is it that God is able to do it and also wants it? Why does evil exist then?
- Is it that God is not able to do it and does not want to? Why call it God then?
According to the Latin writer and Christian apologist Lactantius, the Greek philosopher Epicurus of Samos was the first to formulate this paradox, which is why it is often mentioned by name.
Twin paradox
Also called Paradox of watches, it is a experiment trying to understand the difference in the perception of weather in two observers in different states of motion. It was proposed by Albert Einstein.
It is part of what we know today as Theory of relativity special, where the physical genius explains how, far from being absolute dimensions, time and space depend on the positioning of the observer.
The most usual formulation of this paradox is due, however, to the French physicist Paul Langevin, and takes as protagonists two twins: one of them remains in the Earth while the other undertakes a long journey towards a distant star, in a spacecraft capable of reaching speeds similar to those of the light.
Eventually, the traveling twin returns and realizes that he is younger than his brother on Earth, since the dilation of time would have caused his time to pass more slowly than his brother's own time.
The paradox, however, arises when the observation that, seen from the perspective of the traveling twin, it is the Earth that is moving away at speeds very close to light, and therefore it is its brother who would have to age more slowly.
Time travel paradox
Also known as the Grandfather Paradox, it is a very popular paradox. It was probably formulated by the writer of Science fiction René Barjael in his novel The reckless traveler of 1943, although other authors like Mark Twain had already explored it previously.
The paradox stems from the fact that a man travels through time, going back to the past and being able to murder his mother's father, that is, his grandfather, before he meets his grandmother and conceives his mother.
In this way, his mother would never be born and he himself, therefore, neither, so he could not go back in time and murder his grandfather, then allowing him to meet his grandmother and conceive his mother, who will later conceive him him, thus allowing him to travel back in time and murder his grandfather, and so on.