## 1 Introduction  
Written communication is pivotal for societies to develop because they allow people to describe, discuss, modify, categorize, combine and assess the information being presented. In [1] it is explained that interlocutors use language with the goal of communicating information, but they also aim to minimize energetic cost [2]. [PERSON] and [PERSON] [1] also indicate the importance to consider the communicative function of language as a counter-pressure against compression in language, which only accounts for minimizing energy. Since writing is a form of communication, texts reflect the interaction between _language compression_ and _informativity_, according to their context. This implies that the writer aims at minimizing production cost, while the reader seeks to minimize comprehension cost. Hence, writers aspire to maximize the information within a text, while readers aim for acquiring as much knowledge as possible. For a writer, processing is minimized when a form is clear to express. For the reader, processing is minimized when a form is minimally ambiguous and verbose. This trade-off between communicating information and minimize energy varies according to the intended purpose. Research theses or journal articles, diffusion of science reports, news about economics, politics and even entertainment, differ in syntax, lexicon and length of phrases, to name only a few linguistic variables. As stated in [1], natural languages are richly structured into lexical and phrasal units of varying length. To exemplify this premise, we provide two different texts that were produced to report the confirmation of the existance of gravitational waves. The next extract is borrowed from Reuters [3]. Scientists for the first time have detected gravitational waves, ripples in space and time hypothesized by [PERSON] a century ago, in a landmark discovery announced on Thursday that opens a new window for studying the cosmos. The waves were unleashed by the collision of the black holes, one of them 29 times the mass of the sun and the other 36 times the solar mass, located 1.3 billion light years from Earth, the researchers said. The scientific milestone was achieved using a pair of giant laser detectors in the United States, located in Louisiana and Washington state, capping a decades-long quest to find these waves. They detected remarkably small vibrations from the gravitational waves as they passed through the Earth. The scientists converted the wave signal into audio waves and listened to the sounds of the black holes merging. The next piece of text is the abstract of the scientific article confirming the existence of gravitational waves [4]. On 14 September 2015 at 9.50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal weeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of \(1.0\times 10^{-21}\). It matches the waveform predicted by the general relativity for the inspiral and merger of a pair of black holes and the ringdown of the resulting single black hole. The signal was observed with a marched-filter signal-to-noise ratio of 24 and false alarm rate estimated to be less than 1 event per 203,300 years, equivalent to a significance greater that 5.1\(\delta\)...These observations demonstrate the existence of binary stellar-mass black hole systems. This is the first direct detection of gravitational waves and the first observation of a binary hole merger. The variations of lexical and phrasal units are evident in both texts. For instance, let us compare the expressions that describe the device used to measure the gravitational waves. In the Reuters account it is read _\"a pair of giant laser detectors\"_, while the scientific text makes clear that _\"two detectors of the Laser Interferometer Gravitational-Wave\"_ were employed. It has been stated that people unfamiliar with scientific language will find it comparable to a foreign language in its opacity and difficulty [5].