Entin Square is at the entrance gate to the Tel Aviv University campus in Ramat Aviv.
The square is studded with cobblestones with quotes, sayings, illustrations or formulas of the great scientists, thinkers and writers.
In the next photo taken that day you can see the square and the way the tiles are laid Click for a larger image
Details about the square can be found here Click for sign's details
In the current plate appears the well-known theorem of the French philosopher and mathematician René Descartes (1650-1596). Descartes who was one of the great philosophers and paved the way for the philosophy of the natural sciences. As a mathematician, Descartes is known as the inventor of the geometric axis system.
The sentence that appears on the plaque (I think, therefore I am) first appeared in 1637 in his book "Discourse on the Method" and later in the book "Principles of Philosophy" (1644), and its meaning is that since a persons senses can mislead him and give him a false perception of reality, only the persons thinking is the one that indicates its existence.
Three months later, the same square was photographed, during that action it was discovered that a number of pavements had been removed and other pavements had been placed in their place. In this tile the design is different, see the other tile Click for a larger image