“It has been a long road from Plato's Meno to the present, but it is perhaps encouraging that most of the progress along that road has been made since the turn of the twentieth century, and a large fraction of it since the midpoint of the century. Thought was still wholly intangible and ineffable until modern formal logic interpreted it as the manipulation of formal tokens. And it seemed still to inhabit mainly the heaven of Platonic ideals, or the equally obscure spaces of the human mind, until computers taught us how symbols could be processed by machines.”
Source: Computer Science as Empirical Inquiry: Symbols and Search (1975), p. 125.
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Allen Newell 7
American cognitive scientist 1927–1992Related quotes

although Alan Turing had an inkling of it in 1950
The Age of Spiritual Machines: When Computers Exceed Human Intelligence (1999)

Source: Realistic models in probability (1968), p. 1

“It's been a long road and I'm still going strong.”
As quoted in "Nate Diaz discusses win over Conor McGregor" https://www.youtube.com/watch?v=hg6NkqFPOyY (5 March 2016), UFC on FOX, FOX
[Doctors: the biography of medicine, Random House, 1995, 53, https://books.google.com/books?id=22hNffrgFCkC&pg=PA53]
Doctors (1988)
Source: How the Irish Saved Civilization (1995), Ch. VII The End of the World
Source: Daily life of the Etruscans (1964), p. 9