So I have a funny story about Governor General Jules Leger. I was working in the gardens on the grounds as a summer student in 1972 (might have been 1973, I can't quite remember, but it was the first year that women were hired as labourers by the NCC).1/

Rio de Janeiro, 1920. 🇧🇷

São Paulo, 1910. 🇧🇷

“Arpoador”, Rio de Janeiro, 1900. 🇧🇷

“Avenida Paulista”, São Paulo, 1902. 🇧🇷

Recife, 1885. 🇧🇷

1/ The “I Have a Dream" speech is one of the most extraordinary speeches in American history. You should read it again. First, a few thoughts about the common American heritage Dr. King relied upon in calling Americans to rededicate themselves to the unfinished work of freedom.

2/ Dr. King delivered his speech in what he called the “hallowed spot” of the Lincoln memorial. More than a picturesque backdrop, King relied on America’s reverence for Lincoln and the common celebration of Lincoln’s words and acts, especially the Emancipation Proclamation.

3/ “Five score years ago…” King echoes the words of the Gettysburg Address. Like Lincoln, King invokes the Declaration of Independence and the fundamental principles of American freedom, “life, liberty and the pursuit of happiness.” Every person in that crowd knew these words.

4/ The Declaration, Constitution and Emancipation Proclamation declared and established the fundamental American principles of freedom that all Americans knew and believed in. But these principles and promises remained unfulfilled for black Americans.

5/ Lincoln’s audience knew the history of slavery and many had suffered personal loss in the ongoing war. Dr. King’s audience knew the history of violent racism, segregation, and unequal economic opportunity. The Proclamation freed the slaves, “but the Negro still is not free.”

In this thread, I will argue that the conventional wisdom that Shannon's information theory is all about syntax and not about semantics stems from superficial reading. On the contrary, even his 1948 BSTJ paper is already concerned with syntax, semantics, *and* pragmatics. 1/14

Of course, it does not help matters that Shannon himself states that "semantic aspects of communication are irrelevant to the engineering problem" of communication on the first page of his paper. But you have to read the entire paper, not just the first page. 2/14

Let's first pin down the notions of syntax, semantics, and pragmatics in the sense of Charles Morris: syntax is about relation of symbols to other symbols, semantics is about their relation to objects, and pragmatics is about their relation to subjects. 3/14

Let's start with pragmatics. The full formulation of Shannon's theory is concerned with the problem of reliable communication of some state of the world over a noisy medium, subject to a fidelity criterion. This is an operationalist, pragmatist concern. 4/14

We may envision the problem where we take an action U contingent on the state of the world X and incur the cost c(X,U). We cannot access the state of the world directly, but must mediate the act of selecting the action through transmission of symbols over a noisy channel. 5/14