  In his 1989 essay, John Archibald Wheeler has tried to answer the eternal
question of existence. He did it by searching for links between information,
physics, and quanta. The main concept emerging from his essay is that "every
physical quantity, every it, derives its ultimate significance from bits,
binary yes-or-no indications". This concept has been summarized in the
catchphrase "it from bit". In the Wheeler's essay, it is possible to read
several times the echoes of the philosophy of Niels Bohr. The Danish physicist
has pointed out how the quantum and relativistic physics - forcing us to
abandon the anchor of the visual reference of common sense - have imposed a
greater attention to the language. Bohr did not deny the physical reality, but
recognizes that there is always need of a language no matter what a person
wants to do. To put it as Carlo Sini, language is the first toolbox that man
has at hands to analyze the experience. It is not a thought translated into
words, because to think is to operate with signs as reminded us by various
philosophers from Leonardo da Vinci to Ludwig Wittgenstein. [...]
