“As I thought about this, I noted that the bacterium is just a physical system; it's just a bunch of molecules that hang together and do things to one another. So, I wondered, what characteristics are necessary for a physical system to be an autonomous agent? After thinking about this for a number of months I came up with a tentative definition.
My definition is that an autonomous agent is something that can both reproduce itself and do at least one thermodynamic work cycle. It turns out that this is true of all free-living cells, excepting weird special cases. They all do work cycles, just like the bacterium spinning its flagellum as it swims up the glucose gradient. The cells in your body are busy doing work cycles all the time.”

The Adjacent Possible: A Talk with Stuart Kauffman, 2003

Adopted from Wikiquote. Last update Sept. 14, 2021. History

Help us to complete the source, original and additional information

Do you have more details about the quote "As I thought about this, I noted that the bacterium is just a physical system; it's just a bunch of molecules that hang…" by Stuart Kauffman?
Stuart Kauffman photo
Stuart Kauffman 14
American biophysicist 1939

Related quotes

Stuart Kauffman photo
Albert Einstein photo

“I just want to explain what I mean when I say that we should try to hold on to physical reality.
We are … all aware of the situation regarding what will turn out to be the basic foundational concepts in physics: the point-mass or the particle is surely not among them; the field, in the Faraday-Maxwell sense, might be, but not with certainty. But that which we conceive as existing ("real") should somehow be localized in time and space. That is, the real in one part of space, A, should (in theory) somehow "exist" independently of that which is thought of as real in another part of space, B. If a physical system stretches over A and B, then what is present in B should somehow have an existence independent of what is present in A. What is actually present in B should thus not depend the type of measurement carried out in the part of space A; it should also be independent of whether or not a measurement is made in A.
If one adheres to this program, then one can hardly view the quantum-theoretical description as a complete representation of the physically real. If one attempts, nevertheless, so to view it, then one must assume that the physically real in B undergoes a sudden change because of a measurement in A. My physical instincts bristle at that suggestion.
However, if one renounces the assumption that what is present in different parts of space has an independent, real existence, then I don't see at all what physics is supposed to be describing. For what is thought to be a "system" is after all, just conventional, and I do not see how one is supposed to divide up the world objectively so that one can make statements about parts.”

Albert Einstein (1879–1955) German-born physicist and founder of the theory of relativity

"What must be an essential feature of any future fundamental physics?" Letter to Max Born (March 1948); published in Albert Einstein-Hedwig und Max Born (1969) "Briefwechsel 1916-55"<!-- p. 223 Nymphenburger, Munich-->, and in Potentiality, Entanglement and Passion-at-a-Distance: Quantum Mechanical Studies for Abner Shimony, Volume Two edited by Robert Cohen, Michael Horn, and John Stachel (1997), p. 121 http://books.google.com/books?id=DsNoIcQemTsC&lpg=PP1&pg=PA121#v=onepage&q&f=false
1940s

Halle Berry photo

“I never even think about the physicality of roles, until honestly I get the gig and I think, 'OK, now what do I have to do in this one?' Like, I approach it thinking more about the character -- do I respond to it? Is it something I think I can play? Does it seem like it'll be fun?”

Halle Berry (1966) American actress

Betsy Pickle (November 21, 2003) "Berry's tough break - Actress stretches to physical max in 'Gothika'", The Knoxville News-Sentinel, p. 12.

Liam Hemsworth photo

“The thought definitely crosses my mind, but for me, it has always been about reading great scripts and finding things I relate to, and this was one of those. As an actor, I think you always want your work to do well, and I think that’s hopefully what’s going to happen. Hopefully this movie does turn out as great as everyone wants it to be, and hopefully we don’t disappoint anyone.”

Liam Hemsworth (1990) Australian actor

On risks of becoming famous after The Hunger Games. — November 1, 2012, Q&A: Liam Hemsworth on The Hunger Games and Losing Weight for His Role, Krista Smith, November 8, 2011, Vanity Fair, Conde Nast http://www.vanityfair.com/online/daily/2011/11/Liam-Hunger-Games-Post,

Ellen DeGeneres photo
Hugh Laurie photo
Michael Halliday photo
Leonardo DiCaprio photo

Related topics