The Fermi paradox ( or Fermi's paradox ) is the apparent contradiction between high estimates of the probability of the existence of extraterrestrial civilization and humanity's lack of contact with, or evidence for, such civilizations.

This is an apparent paradox that stumped some great physicists, although it does not allow a practical one-way mirror for use in the real world.

In 1905, Albert Einstein solved this apparent paradox by describing light as composed of discrete quanta, now called photons, rather than continuous waves.

The apparent paradox is caused by a hasty generalization, for if the surgeon is the boy's father, the statement cannot be true.

The thought experiment illustrates this apparent paradox.

The stretching of space also accounts for the apparent paradox that two galaxies can be 40 billion light years apart, although they started from the same point 13. 7 billion years ago and never moved faster than the speed of light.

It contains some of the same elements as the Achilles and the Tortoise paradox, but with a more apparent conclusion of motionlessness.

In his book Alice in Puzzleland, the logician Raymond Smullyan had the character Humpty Dumpty explain the apparent paradox to Alice.

A tangram paradox is an apparent dissection fallacy: Two figures composed with the same set of pieces, one of which seems to be a proper subset of the other.

Indeed, as Gerhart and Kirschner have noted, there is an apparent paradox: " where we most expect to find variation, we find conservation, a lack of change ".

Rabbi Isaiah Horowitz explained the apparent paradox of his position by citing the old question, " Can God create a rock so heavy that He cannot pick it up?

Furthermore, on a visit to New York City, he was struck by the apparent paradox that the poor in that long-established city were much worse off than the poor in less developed California.

As a resolution of this apparent paradox and in defiance of Hohfeld, Robert Nozick asserted that there are no positive civil rights, only rights to property and the right of autonomy.

Kaysen finds that this apparent paradox isn't confined to the hospital.

Ferguson, a devout Presbyterian, resolved the apparent paradox by placing both developments in the context of a divinely ordained plan that mandated both progress and human free will.

" Lazarus argues that " the most sensible explanation of this apparent paradox is that people ... develop favorable or unfavorable expectations " that guide such assessments.

The paradox identifies apparent inconsistency between three seemingly true beliefs about population ethics by arguing that utilitarianism leads to an apparent overpopulated world with minimal individual happiness.

The apparent paradox formed part of a great dispute over the nature of infinity involving many of the key thinkers of the time including Thomas Hobbes, John Wallis and Galileo Galilei.

Since the Horn has finite volume but infinite surface area, it seems that it could be filled with a finite quantity of paint, and yet that paint would not be sufficient to coat its inner surface – an apparent paradox.

Hill questions the legitimacy of early premillennial thought by analyzing an apparent paradox in the early chiliast theology, particularly the intermediate state.

This apparent paradox is logically explained by the existence of many claims to samurai loyalty that were presented: towards rival imperialist generals, shugo lords, and even towards local samurai alliances.

In literary terminology, a paradox is an apparent contradiction that is nevertheless somehow true.

The one apparent connection between the two is a score of buildings which somehow or other have survived and which naturally enough are called `` historical monuments ''.

Today our surging strength is apparent to everyone.

After allowing for group exposures, it is apparent that other factors must be considered if we are to comprehend fanaticism.

When we turn to Aristotle's ideas on the moral measure of literature, it is at once apparent that he is at times equally concerned about the influence of the art.

His revolutionary anger is apparent in most of his early poems.

It should be appallingly apparent that city-trading is not a profitable military tactic.

The concept of apparent black-body temperature is used to describe the radiation received from the moon and the planets.

The apparent black-body disk temperature is the temperature which must be assumed for the black body in order that the intensity of its radiation should equal that of the observed radiation.

It is apparent from the above and from experimental evidence that the cooling requirements for the anode of free burning arcs are large compared with those for the cathode.

It is presumed that this negative head was associated with some geometric factor of the assembly, since different readings were obtained with the same fluid and the only apparent difference was the assembly and disassembly of the apparatus.

In some programs, treatment is concentrated over a short period of time, while in others, after the initial contact is established, flexible spacing of interviews has been experimentally used with apparent success.

There is no apparent reason why we should feel bound by Swadesh's rules and procedure since his predilections and aims have grown so vast.

A training program in a depressed area may have few enrollees unless there is some apparent prospect for better employment opportunities afterwards, and the prospect may be poor if the training is aimed solely at jobs in the local community.

It is apparent, therefore, that the teacher needs to know what factors have a vital bearing on the learning and adjustment of children.

Although slab stock appeared first, it soon became apparent that for the production of cushions with irregular shapes, crowned contours, or rounded edges, the cutting of slab stock is a wasteful and uneconomical process.

Within the first five minutes of this interview it is apparent to the therapist that `` everybody '' truthfully refers to the woman's husband.

The secretary's greatest achievement is perhaps the rekindling of NATO realization that East-West friction, wherever it take place around the globe, is in essence the general conflict between two entirely different societies, and must be treated as such without regard to geographical distance or lack of apparent connection.

But it is apparent that no acceptable formula has been found to prevent such a possibility.

Hughes said Monday, `` It is the apparent intention of the Republican Party to campaign on the carcass of what they call Eisenhower Republicanism, but the heart stopped beating and the lifeblood congealed after Eisenhower retired.

It is this spirit which explains some of the anomalies of American Catholic higher education, in particular the wasteful duplication apparent in some areas.

The need for lifetime reading is apparent.