Dialogue

 1 Intro|       divine their future; and he knows that sympathy is the secret
 2 Intro|         ignorant of that which he knows?’ No answer is given to
 3 Intro|           true.’ ‘And he who sees knows?’ ‘Yes.’ ‘And he who remembers,
 4 Intro|  remembers that which he sees and knows?’ ‘Very true.’ ‘But if he
 5 Intro|         with the world; he hardly knows whether his neighbour is
 6 Intro|           his adversaries (for he knows no evil of any one); and
 7 Intro|     serviceable knave, who hardly knows how to wear his cloak,—still
 8 Intro| impression of neither; or when he knows one and does not know the
 9 Intro|          of the other; or when he knows neither; or when he perceives
10 Intro|          or when he perceives and knows both, and identifies what
11 Intro|         he perceives with what he knows (this is still more impossible);
12 Intro|          when he confuses what he knows or perceives, or what he
13 Intro|       does not know, with what he knows, or what he knows and perceives
14 Intro|         what he knows, or what he knows and perceives with what
15 Intro|        and perceives with what he knows and perceives.~Theaetetus
16 Intro|      false opinion, or that a man knows what he does not know.~We
17 Intro|     knowledge. But how can he who knows the forms of knowledge and
18 Intro|         letters; yet not until he knows both can he be said to have
19 Intro|         written or oral, which he knows by experience to be trustworthy.
20 Intro|           his own observation. He knows distance because he is taught
21 Intro|         interest to him; he alone knows the secret which has been
22 Intro|         unseen world. Somehow, he knows not how, somewhere, he knows
23 Intro|      knows not how, somewhere, he knows not where, under this higher
24 Intro|         than every reflecting man knows or can easily verify for
25  Thea|         to do my best. Now he who knows perceives what he knows,
26  Thea|           knows perceives what he knows, and, as far as I can see
27  Thea|           memory of that which he knows, not know that which he
28  Thea|       definition holds, every man knows that which he has seen?~
29  Thea|    SOCRATES: As thus: he who sees knows, as we say, that which he
30  Thea|       also not know that which he knows?~THEODORUS: How shall we
31  Thea|           the philosopher no more knows than he can tell, as they
32  Thea|           is doing, but he hardly knows whether he is a man or an
33  Thea|           his adversaries, for he knows no scandals of any one,
34  Thea|           smartly and neatly, but knows not how to wear his cloak
35  Thea|          of his neighbour that he knows nothing. From these men,
36  Thea|          about something which he knows or does not know?~THEAETETUS:
37  Thea|         He must.~SOCRATES: He who knows, cannot but know; and he
38  Thea|       does he think that which he knows to be some other thing which
39  Thea|         some other thing which he knows, and knowing both, is he
40  Thea|         not know; for example, he knows neither Theaetetus nor Socrates,
41  Thea|         he cannot suppose what he knows to be what he does not know,
42  Thea|       does not know to be what he knows?~THEAETETUS: That would
43  Thea|            When he thinks what he knows, sometimes to be what he
44  Thea|           sometimes to be what he knows, and sometimes to be what
45  Thea|       another occur, when he only knows one, and does not know,
46  Thea|          does not know is what he knows; nor (2) that one thing
47  Thea|           that something which he knows and perceives, and of which
48  Thea|           something else which he knows and perceives, and of which
49  Thea|           that something which he knows and perceives, and of which
50  Thea|           something else which he knows; nor so long as these agree,
51  Thea|       think that a thing which he knows and perceives is another
52  Thea|         that some things which he knows, or which he perceives and
53  Thea|        some other things which he knows and perceives; or that some
54  Thea|         that some things which he knows and perceives, are other
55  Thea|         are other things which he knows and perceives.~THEAETETUS:
56  Thea|   perceive sensibly that which he knows.~THEAETETUS: True.~SOCRATES:
57  Thea|           say, that when a person knows and perceives one of you,
58  Thea|        some other person, whom he knows and perceives, and the knowledge
59  Thea|          think one thing which he knows to be another thing which
60  Thea|         be another thing which he knows; but this, as we said, was
61  Thea|        may not know that which he knows;— which alternative do you
62  Thea|           into something which he knows, as if he did not know it,
63  Thea|          already admitted that he knows all numbers;—you have heard
64  Thea|          we say, that although he knows, he comes back to himself
65  Thea|          to learn what he already knows?~THEAETETUS: It would be
66  Thea|          we have admitted that he knows all letters and all numbers?~
67  Thea|        man not know that which he knows, but he may get a false
68  Thea|         man’s not knowing what he knows, for we are not driven to
69  Thea|         ignorant of that which he knows, not by reason of ignorance,
70  Thea|         and he will fancy that he knows the things about which he
71  Thea|           say, laughing, if a man knows the form of ignorance and
72  Thea|         that one of them which he knows is the other which he knows?
73  Thea|       knows is the other which he knows? or, if he knows neither
74  Thea|         which he knows? or, if he knows neither of them, can he
75  Thea|       think that the one which he knows not is another which he
76  Thea|           not is another which he knows not? or, if he knows one
77  Thea|           he knows not? or, if he knows one and not the other, can
78  Thea|         he think the one which he knows to be the one which he does
79  Thea|       know to be the one which he knows? or will you tell me that
80  Thea|         own name; must not he who knows the syllable, know both
81  Thea|           Certainly.~SOCRATES: He knows, that is, the S and O?~THEAETETUS:
82  Thea|          e—can we suppose that he knows the first syllables of your
83  Thea|         And in that case, when he knows the order of the letters