Should Barbie chat with children?

ChatGPT and similar tools, called LLMs (Large Language Models), are being used with greater frequency in our daily lives. Google, for instance, has integrated its GEMINI tool with its search engine. Sometimes, when the program behind the search engine deems it appropriate, the question asked is sent to GEMINI, and the response of the LLM appears first, albeit with this warning at the end, in small print:

AI responses may include mistakes.

Of course, they may include mistakes! These responses are not generated by understanding the question, but by using information previously obtained from the Internet, and applying an algorithm based on extracting words that typically appear in that information after the previously generated words. See a post in this blog where I explained that algorithm. Since the information extracted from the Internet can be true or false, and the algorithm can introduce new falsehoods where none existed, the answers obtained may be correct, partially correct, or completely wrong, therefore Google's warning is valid.

More bad uses of scientific language

George Boole

To continue with the previous post, I’ll add here a few more cases of bad translations between English and Spanish, many of them due to the existence of false friends between those languages. In other cases, the English word is used as-is, although there is a Spanish word that can be used instead.

Bad uses of scientific language

Journalists and scientists perpetrate sometimes abuses of scientific language. In this post, I’ll mention a few.

·      Heard on the radio news: Meteorology is to blame for the spread of this fire. I suppose we must sue the meteorologists. According to Wikipedia, Meteorology is the scientific study of the Earth's atmosphere and short-term atmospheric phenomena (i.e. weather), with a focus on weather forecasting. Apparently, saying that excessive heat or dryness is to blame for the spread of the fire is too vulgar, and the news needs to be phrased in a more scientific way.

·     DNA (deoxyribonucleic acid) is a molecule that contains the genetic information of living beings. The idea of ​​identifying it with the properties that define a different entity, such as a cultural construct or a society, is an ingenious metaphor, but through overuse and repetition it becomes hackneyed. We hear frequently about the DNA of a football club, or the DNA of a company, or the DNA of the work of an artist.

·      A variation on the previous case consists of using the word genome instead of DNA with the same meaning, as in this example, which appeared in an article in the Spanish newspaper El País with the following headline: The household genome: the new consumer battle is fought at home.

Mysterious Particles

Some physicists sometimes act as if the hypotheses they propose to explain the mysteries of the universe are always true. But a hypothesis is nothing more than a proposal to explain a natural phenomenon, and it cannot be considered a confirmed theory until it has provided one or more surprisingly accurate predictions. This last detail, which is essential, is usually omitted.

In 2020, I read two popular books on cosmology and particle physics (the two branches of physics are closely related):

Can density be infinite?

First photo
of a black hole

Einstein’s general theory of relativity allows for the existence of objects with infinite density (singularities). There are two types:

1.      Black holes, accumulations of matter in a null volume, either at the center of a galaxy, or as the result of a supernova explosion.

2.      The universe, at its initial moment (the Big Bang).

A star like the sun is in equilibrium because the gravitational attraction, which tends to make it contract, is equal to the expansion caused by the nuclear reactions taking place inside the star. When a star much larger than the sun exhausts its nuclear fuel (first hydrogen, then helium, then other elements), as there are no longer nuclear reactions to stop the contraction, the star implodes. When the implosion rebounds, the star throws large quantities of matter into space: a supernova explosion, which for some time makes the star brighter than a whole galaxy. But there is always a remainder of matter, which gives rise to a new type of object.

Is time infinite?

S.Augustin, by Louis Comfort Tiffany
Lightner Museum

Since ancient times, man has been interested in the enigma of time. Even though we all experience time, time is an enigma. As St. Augustine said in his Confessions (B.XI C.XIV): What is time? If no one asks me, I know; if I want to explain it to a questioner, I don’t know.

As I said in another post, the explanations devised to solve the enigma of time are of two types: those that consider it cyclical, with or without multiple repetitions, which would allow the passage of time to be represented geometrically by a circle, and those that consider it linear, which represent it by a straight line. In turn, this last case is divided into several: one can accept, or not, that time had a beginning; and one can accept, or not, that there will be a final moment of time. Combining these two alternatives, we have four different cases. So in total there are six possibilities, which we will analyze next in the light of modern cosmology:

Is space infinite?

Georg Cantor

According to Georg Cantor, one of the first to study the concept of infinity in depth, there is not just one concept of infinity, but three different ones. Let's see how he expresses it:

The actual infinite arises in three contexts: first when it is realized in the most complete form, in a fully independent other-worldly being, in Deo, where I call it the Absolute Infinite or simply Absolute; second when it occurs in the contingent, created world; third when the mind grasps it in abstracto as a mathematical magnitude, number, or order type. I wish to make a sharp contrast between the Absolute and what I call the Transfinite, that is, the actual infinities of the last two sorts, which are clearly limited, subject to further increase, and thus related to the finite. (Georg Cantor, Gesammelte Abhandlungen, Springer, 1980. Translation taken from Rudy Rucker, Infinity and the Mind, Princeton University Press, 2004).