I Am a Strange Loop

PROLOGUE

An Affable Locking of Horns

[As I stated in the Preface, I wrote this dialogue when I was a teen-ager, and it was my first, youthful attempt at grappling with these difficult ideas.]

Dramatis personæ:

Plato: a seeker of truth who suspects consciousness is an illusion

Socrates: a seeker of truth who believes in consciousness’ reality

PLATO: But what then do you mean by “life”, Socrates? To my mind, a living creature is a body which, after birth, grows, eats, learns how to react to various stimuli, and which is ultimately capable of reproduction.

SOCRATES: I find it interesting, Plato, that you say a living creature is a body, rather than has a body. For surely, many people today would say that there are at least some living creatures that have souls independent of their bodies.

PLATO: Yes, and with those I would agree. I should have said that living creatures have bodies.

SOCRATES: Then you would agree that fleas and mice have souls, however insignificant.

PLATO: My definition does require that, yes.

SOCRATES: And do trees have souls, and blades of grass?

PLATO: You have used words to put me in this situation, Socrates. I will revise what I said — only animals have souls.

SOCRATES: But no, I have not only used words, for there is no distinction to be found between plants and animals, if you examine small enough creatures.

PLATO: You mean there are some creatures sharing the properties of plant and animal? Yes, I guess I can imagine such a thing, myself. Now I suppose you will force me into saying that only humans have souls. SOCRATES: No, on the contrary, I will ask you, what animals do you usually consider to have souls?

PLATO: Why, all higher animals — those which are able to think. SOCRATES: Then, at least higher animals are alive. Now can you truly consider a stalk of grass to be a living creature like yourself?

PLATO: Let me put it this way, Socrates: I can only imagine true life with a soul, and so I must discard grass as true life, though I could say it has the symptoms of life.

SOCRATES: I see. So you would classify soulless creatures as only appearing alive, and creatures with souls as true life. Then am I right if I say that your question “What is true life?” depends on the understanding of the soul?

PLATO: Yes, that is right.

SOCRATES: And you have said that you consider the soul as the ability to think?

PLATO: Yes.

SOCRATES: Then you are really seeking the answer to “What is thinking?” PLATO: I have followed each step of your argument, Socrates, but this conclusion makes me uneasy.

SOCRATES: It has not been my argument, Plato. You have provided all the facts, and I have only drawn logical conclusions from them. It is curious, how one often mistrusts one’s own opinions if they are stated by someone else.

PLATO: You are right, Socrates. And surely it is no simple task to explain thinking. It seems to me that the purest thought is the knowing of something; for clearly, to know something is more than just to write it down or to assert it. These can be done if one knows something; and one can learn to know something from hearing it asserted or from seeing it written. Yet knowing is more than this — it is conviction — but I am only using a synonym. I find it beyond me to understand what knowing is, Socrates.

SOCRATES: That is an interesting thought, Plato. Do you say that knowing is not so familiar as we think it is?

PLATO: Yes. Because we humans have knowledge, or convictions, we are humans, yet when we try to analyze knowing itself, it recedes, and evades us.

SOCRATES: Then had one not better be suspicious of what we call “knowing”, or “conviction”, and not take it so much for granted?

PLATO: Precisely. We must be cautious in saying “I know”, and we must ponder what it truly means to say “I know” when our minds would have us say it.

SOCRATES: True. If I asked you, “Are you alive?”, you would doubtless reply, “Yes, I am alive.” And if I asked you, “How do you know that you are alive?”, you would say “I feel it, I know I am alive — indeed, is not knowing and feeling one is alive being alive?” Is that not right?

PLATO: Yes, I would certainly say something to that effect.

SOCRATES: Now let us suppose that a machine had been constructed which was capable of constructing English sentences and answering questions. And suppose I asked this English machine, “Are you alive?” and suppose it gave me precisely the same answers as you did. What would you say as to the validity of its answers?

PLATO: I would first of all object that no machine can know what words are, or mean. A machine merely deals with words in an abstract mechanical fashion, much as canning machines put fruit in cans.

SOCRATES: I do not accept your objections for two reasons. Surely you do not contend that the basic unit of human thought is the word? For it is well known that humans have nerve cells, the laws of whose operation are arithmetical. Secondly, you cautioned earlier that we must be wary of the verb “to know”, yet here you use it quite nonchalantly. What makes you say that no machine could ever “know” what words are, or mean?

PLATO: Socrates, do you argue that machines can know facts, as we humans do?

SOCRATES: You declared just now that you yourself cannot even explain what knowing is. How did you learn the verb “to know” as a child?

PLATO: Evidently, I assimilated it from hearing it used around me.

SOCRATES: Then it was by automatic action that you gained control of it.

PLATO: No… Well, perhaps I see what you mean. I grew accustomed to hearing it in certain contexts, and thus came to be able to use it myself in those contexts, in a more or less automatic fashion.

SOCRATES: Much as you use language now — without having to reflect on each word?

PLATO: Yes, exactly.

SOCRATES: Thus now, if you say, “I know I am alive”, that sentence is merely a reflex coming from your brain, and is not a product of conscious thought.

PLATO: No, no! You or I have used faulty logic. Not all thoughts I utter are simply products of reflex actions. Some thoughts I think about consciously before uttering.

SOCRATES: In what sense do you think consciously about them?

PLATO: I don’t know. I suppose that I try to find the correct words to describe them.

SOCRATES: What guides you to the correct words?

PLATO: Why, I search logically for synonyms, similar words, and so on, with which I am familiar.

SOCRATES: In other words, habit guides your thought.

PLATO: Yes, my thought is guided by the habit of connecting words with one another systematically.

SOCRATES: Then once again, these conscious thoughts are produced by reflex action.

PLATO: I do not see how I can know I am conscious, how I can feel alive, if this is true, yet I have followed your argument.

SOCRATES: But this argument itself shows that your reaction is merely habit, or reflex action, and that no conscious thought is leading you to say you know you are alive. If you stop to consider it, do you really understand what you mean by saying such a sentence? Or does it just come into your mind without your thinking consciously of it?

PLATO: Indeed, I am so confused I scarcely know.

SOCRATES: It becomes interesting to see how one’s mind fails when working in new channels. Do you see how little you understand of that sentence “I am alive”?

PLATO: Yes, it is truly a sentence which, I must admit, is not so obvious to understand.

SOCRATES: I think it is in the same way as you fashioned that sentence that many of our actions come about — we think they arise through conscious thought, yet, on careful analysis, each bit of that thought is seen to be automatic and without consciousness.

PLATO: Then feeling one is alive is merely an illusion propagated by a reflex that urges one to utter, without understanding, such a sentence, and a truly living creature is reduced to a collection of complex reflexes. Then you have told me, Socrates, what you think life is.