// produce a response to the given 'input' using the given 'rules'
std::string eliza(rulemap & rules, const std::string & input)
{
    // convert the given input string to a list of uppercase words
    // e.g. "Hello, world!" -> (HELLO , WORLD !)
    stringlist words(split(to_upper(input)));


    // scan for keywords; build the keystack; apply word substitutions
    stringlist keystack;
    int top_rank = 0;
    for (auto word = words.begin(); word != words.end(); ) {
        if (punctuation(*word)) {
            // keep only the first clause to contain a keyword [page 37 (c)]
            if (keystack.empty()) {
                // discard left of punctuation, continue scanning what remains
                word = words.erase(words.begin(), ++word);
                continue;
            }
            else {
                // discard right of punctuation, scan is complete
                word = words.erase(word, words.end());
                break;
            }
        }

        const auto r = rules.find(*word);
        if (r != rules.end()) {
            const auto & rule = r->second;
            if (rule->has_transformation()) {
                if (rule->precedence() > top_rank) {
                    // *word is a keyword with precedence > highest
                    // found previously: it goes top of the keystack
                    keystack.push_front(*word);
                    top_rank = rule->precedence();
                }
                else {
                    // *word is a keyword with precedence < highest
                    // found previously: it goes bottom of the keystack
                    keystack.push_back(*word);
                }
            }
            rule->apply_word_substitution(*word); // [page 39 (a)]
        }

        ++word;
    }

    auto memory_rule = get_rule<rule_memory>(rules, SPECIAL_RULE_MEMORY);
    if (keystack.empty()) {
        // a text without keywords; can we recall a MEMORY? [page 41 (f)]
        if (memory_rule->is_time_for_recollection())
            return memory_rule->recall_memory();
    }

    // build tag mapping so that e.g. tags[BELIEF] -> (BELIEVE FEEL THINK WISH)
    const tagmap tags(collect_tags(rules));

    // the keystack contains all keywords that occur in the given 'input';
    // apply transformation associated with the top keyword [page 39 (d)]
    while (!keystack.empty()) {
        const std::string top_keyword = pop_front(keystack);

        auto rule = rules.find(top_keyword);
        if (rule == rules.end())
            break; // could happen if a rule links to non-existent keyword

        // try to lay down a memory for future use
        memory_rule->create_memory(top_keyword, words, tags);

        // perform the transformation for this rule
        std::string link_keyword;
        auto act = rule->second->apply_transformation(words, tags, link_keyword);

        if (act == rule_base::complete)
            return join(words); // decomposition/reassembly successfully applied

        if (act == rule_base::inapplicable)
            break; // no decomposition rule matched the input words

        if (act == rule_base::linkkey)
            keystack.push_front(link_keyword); // rule links to another; loop

        // (rule_base::newkey -> rule wants to try next highest keyword, if any)
        assert(act == rule_base::linkkey || act == rule_base::newkey);
    }


    // last resort: the NONE rule never fails to produce a response
    auto none_rule = get_rule<rule_vanilla>(rules, SPECIAL_RULE_NONE);
    std::string discard;
    none_rule->apply_transformation(words, tags, discard);
    return join(words);
}

**********************************************************************
** Visual Studio 2019 Developer Command Prompt v16.8.5
** Copyright (c) 2020 Microsoft Corporation
**********************************************************************
[vcvarsall.bat] Environment initialized for: 'x64'

C:\Program Files (x86)\Microsoft Visual Studio\2019\Community>cd C:\Eliza

C:\Eliza>dir /b
1966_01_CACM_article_Eliza_script.txt
eliza.cpp

C:\Eliza>cl /EHsc /W4 eliza.cpp
Microsoft (R) C/C++ Optimizing Compiler Version 19.28.29337 for x64
Copyright (C) Microsoft Corporation.  All rights reserved.

eliza.cpp
Microsoft (R) Incremental Linker Version 14.28.29337.0
Copyright (C) Microsoft Corporation.  All rights reserved.

/out:eliza.exe
eliza.obj

C:\Eliza>eliza
Usage: eliza <scriptfile>
  where <scriptfile> is in original 1966 ELIZA script format

C:\Eliza>eliza 1966_01_CACM_article_Eliza_script.txt
HOW DO YOU DO. PLEASE TELL ME YOUR PROBLEM

Men are all alike.
IN WHAT WAY

^C
C:\Eliza>

Men are all alike.
IN WHAT WAY
They're always bugging us about something or other.
CAN YOU THINK OF A SPECIFIC EXAMPLE
Well, my boyfriend made me come here.
YOUR BOYFRIEND MADE YOU COME HERE
He says I'm depressed much of the time.
I AM SORRY TO HEAR YOU ARE DEPRESSED
It's true. I am unhappy.
DO YOU THINK COMING HERE WILL HELP YOU NOT TO BE UNHAPPY
I need some help, that much seems certain.
WHAT WOULD IT MEAN TO YOU IF YOU GOT SOME HELP
Perhaps I could learn to get along with my mother.
TELL ME MORE ABOUT YOUR FAMILY
My mother takes care of me.
WHO ELSE IN YOUR FAMILY TAKES CARE OF YOU
My father.
YOUR FATHER
You are like my father in some ways.
WHAT RESEMBLANCE DO YOU SEE
You are not very aggressive, but I think you don't want me to notice that.
WHAT MAKES YOU THINK I AM NOT VERY AGGRESSIVE
You don't argue with me.
WHY DO YOU THINK I DON'T ARGUE WITH YOU
You are afraid of me.
DOES IT PLEASE YOU TO BELIEVE I AM AFRAID OF YOU
My father is afraid of everybody.
WHAT ELSE COMES TO MIND WHEN YOU THINK OF YOUR FATHER
Bullies.
DOES THAT HAVE ANYTHING TO DO WITH THE FACT THAT YOUR BOYFRIEND MADE YOU COME HERE

I know my boyfriend loves me and is just trying to help.
WHY DO YOU SAY YOUR BOYFRIEND LOVES YOU AND IS JUST TRYING TO HELP
I didn't really come here because my boyfriend is a bully.
DOES THAT SUGGEST ANYTHING ELSE WHICH BELONGS TO YOU
That's a funny question.
I AM NOT SURE I UNDERSTAND YOU FULLY
Let's start again. I'm depressed and I need your help.
WHY DO YOU WANT MY HELP
Because I can't seem to get out of my spiral of depression on my own.
IS IT IMPORTANT TO YOU THAT YOUR SPIRAL OF DEPRESSION ON YOUR OWN
You mean, is it important to me that I'm depressed? Of course it is.
WE WERE DISCUSSING YOU - NOT ME
I know we were.
YOU SAY YOU KNOW WE WAS
I don't think English is your first language.
DON'T YOU REALLY THINK ENGLISH IS MY FIRST LANGUAGE
I'm sorry, I didn't mean to be rude.
IS IT BECAUSE YOU ARE SORRY THAT YOU CAME TO ME
I already told you, I'm depressed and my boyfriend thought I should come see you.
PERHAPS IN YOUR FANTASY WE ALREADY TOLD EACH OTHER
Excuse me?
PLEASE GO ON
Look, aren't you going to ask me about my dreams or something?
WHAT DOES THAT DREAM SUGGEST TO YOU
You're not making sense.
DO YOU SOMETIMES WISH YOU WERE NOT MAKING SENSE
I can't say I ever have wished for that.
HOW DO YOU KNOW YOU CAN'T SAY YOU EVER HAVE WISHED FOR THAT
Because I have no memory of ever wishing to not make sense.
IS THAT THE REAL REASON
Dude, we're going in circles.
LETS DISCUSS FURTHER WHY YOUR MOTHER
Why my mother what?
TELL ME MORE ABOUT YOUR FAMILY
Is there any point?
WHAT DOES THAT SUGGEST TO YOU
It suggests to me that you are a giant electronic brain.
PERHAPS YOU WOULD LIKE TO BE A GIANT ELECTRONIC BRAIN

;
; APPENDIX. An Eliza Script
;
; Transcribed from Joseph Weizenbaum's article on page 36 of the January
; 1966 edition of Communications of the ACM titled 'ELIZA - A Computer
; Program For the Study of Natural Language Communication Between Man And
; Machine'.
;
; "Keywords and their associated transformation rules constitute the
; SCRIPT for a particular class of conversation. An important property of
; ELIZA is that a script is data; i.e., it is not part of the program
; itself." -- From the above mentioned article.
;
; Transcribed by Anthony Hay, December 2020
;
;
; Notes
;
; This is a verbatim transcription of the ELIZA script in the above
; mentioned CACM article, with the following caveats:
; a) Whitespace has been added to help reveal the structure of the
;    script.
; b) In the appendix six lines were printed twice adjacent to each other
;    (with exactly 34 lines between each duplicate), making the structure
;    nonsensical. These duplicates have been commented out of this
;    transcription.
; c) One closing bracket has been added and noted in a comment.
; d) There were no comments in the script in the CACM article.
;
;
; The script has the form of a series of S-expressions of varying
; composition. (Weizenbaum says "An ELIZA script consists mainly of a set
; of list structures...", but nowhere in the article are S-expressions or
; LISP mentioned. Perhaps it was too obvious to be noted.) Weizenbaum says
; ELIZA was written in MAD-Slip. It seems his original source code has
; been lost. Weizenbaum developed a library of FORTRAN functions for
; manipulating doubly-linked lists, which he called Slip (for Symmetric
; list processor).
;
; The most common transformation rule has the form:
;
;   (keyword [= replacement-keyword] [precedence]
;     [ ((decomposition-rule-0) (reassembly-rule-00) (reassembly-rule-01) ...)
;       ((decomposition-rule-1) (reassembly-rule-10) (reassembly-rule-11) ...)
;       ... ] )
;
; where [ ] denotes optional parts. Initially, ELIZA tries to match the
; decomposition rules against the input text only for the highest ranked
; keyword found in the input text. If a decomposition rule matches the
; input text the first associated reassembly rule is used to generate
; the output text. If there is more than one reassembly rule they are
; used in turn on successive matches.
;
; In the decomposition rules '0' matches zero or more words in the input.
; So (0 IF 0) matches "IF POSSIBLE" and "WHAT IF YOU DIE". Numbers in
; the reassembly rules refer to the parts of the decomposition rule
; match. 1 <empty>, 2 "IF", 3 "POSSIBLE" and 1 "WHAT", 2 "IF", 3 "YOU DIE"
; in the above examples. If the selected reassembly rule was (DO YOU THINK
; ITS LIKELY THAT 3) the text output would be "DO YOU THINK ITS LIKELY
; THAT YOU DIE".
;
;
; Each rule has one of the following six forms:
;
; R1. Plain vanilla transformation rule. [page 38 (a)]
;     (keyword [= keyword_substitution] [precedence]
;         [ ((decomposition_pattern) (reassembly_rule) (reassembly_rule) ... )
;            (decomposition_pattern) (reassembly_rule) (reassembly_rule) ... )
;            :
;            (decomposition_pattern) (reassembly_rule) (reassembly_rule) ... )) ] )
;   e.g.
;     (MY = YOUR 2
;         ((0 YOUR 0 (/FAMILY) 0)
;             (TELL ME MORE ABOUT YOUR FAMILY)
;             (WHO ELSE IN YOUR FAMILY 5)
;             (=WHAT)
;             (WHAT ELSE COMES TO MIND WHEN YOU THINK OF YOUR 4))
;         ((0 YOUR 0 (*SAD UNHAPPY DEPRESSED SICK ) 0)
;             (CAN YOU EXPLAIN WHAT MADE YOU 5))
;         ((0)
;             (NEWKEY)))
;
;
; R2. Simple word substitution with no further transformation rules. [page 39 (a)]
;     (keyword = keyword_substitution)
;   e.g.
;     (DONT = DON'T)
;     (ME = YOU)
;
;
; R3. Allow words to be given tags, with optional word substitution. [page 41 (j)]
;     (keyword [= keyword_substitution]
;         DLIST (/ <word> ... <word>))
;   e.g.
;         (FEEL               DLIST(/BELIEF))
;         (MOTHER             DLIST(/NOUN FAMILY))
;         (MOM = MOTHER       DLIST(/ FAMILY))
;
;
; R4. Link to another keyword transformation rule. [page 40 (c)]
;     (keyword [= keyword_substitution] [precedence]
;         (= equivalence_class))
;   e.g.
;         (HOW                (=WHAT))
;         (WERE = WAS         (=WAS))
;         (DREAMED = DREAMT 4 (=DREAMT))
;         (ALIKE 10           (=DIT))
;
;
; R5. As for R4 but allow pre-transformation before link. [page 40 (f)]
;     (keyword [= keyword_substitution]
;         ((decomposition_pattern)
;             (PRE (reassembly_rule) (=equivalence_class))))
;   e.g.
;     (YOU'RE = I'M
;         ((0 I'M 0)
;             (PRE (I ARE 3) (=YOU))))
;
;
; R6. Rule to 'pre-record' responses for later use. [page 41 (f)]
;     (MEMORY keyword
;         (decomposition_pattern_1 = reassembly_rule_1)
;         (decomposition_pattern_2 = reassembly_rule_2)
;         (decomposition_pattern_3 = reassembly_rule_3)
;         (decomposition_pattern_4 = reassembly_rule_4))
;   e.g.
;     (MEMORY MY
;         (0 YOUR 0 = LETS DISCUSS FURTHER WHY YOUR 3)
;         (0 YOUR 0 = EARLIER YOU SAID YOUR 3)
;         (0 YOUR 0 = BUT YOUR 3)
;         (0 YOUR 0 = DOES THAT HAVE ANYTHING TO DO WITH THE FACT THAT YOUR 3))
;
;
; In addition, there must be a NONE rule with the same form as R1. [page 41 (d)]
;     (NONE
;         ((0)
;             (reassembly_rule)
;             (reassembly_rule)
;             :
;             (reassembly_rule)) )
;   e.g.
;     (NONE
;         ((0)
;             (I AM NOT SURE I UNDERSTAND YOU FULLY)
;             (PLEASE GO ON)
;             (WHAT DOES THAT SUGGEST TO YOU)
;             (DO YOU FEEL STRONGLY ABOUT DISCUSSING SUCH THINGS)))
;
;
; For further details see Weizenbaum's article, or look at eliza.cpp.
;


(HOW DO YOU DO.  PLEASE TELL ME YOUR PROBLEM)

START

(SORRY
    ((0)
        (PLEASE DON'T APOLIGIZE)
        (APOLOGIES ARE NOT NECESSARY)
        (WHAT FEELINGS DO YOU HAVE WHEN YOU APOLOGIZE)
        (I'VE TOLD YOU THAT APOLOGIES ARE NOT REQUIRED)))

(DONT = DON'T)
(CANT = CAN'T)
(WONT = WON'T)

(REMEMBER 5
    ((0 YOU REMEMBER 0)
         (DO YOU OFTEN THINK OF 4)
         (DOES THINKING OF 4 BRING ANYTHING ELSE TO MIND)
         (WHAT ELSE DO YOU REMEMBER)
         (WHY DO YOU REMEMBER 4 JUST NOW)
         (WHAT IN THE PRESENT SITUATION REMINDS YOU OF 4)
         (WHAT IS THE CONNECTION BETWEEN ME AND 4))
    ((0 DO I REMEMBER 0)
         (DID YOU THINK I WOULD FORGET 5)
         (WHY DO YOU THINK I SHOULD RECALL 5 NOW)
         (WHAT ABOUT 5)
         (=WHAT)
         (YOU MENTIONED 5))
    ((0)
         (NEWKEY)))

(IF 3
    ((0 IF 0)
        (DO YOU THINK ITS LIKELY THAT 3)
        (DO YOU WISH THAT 3)
        (WHAT DO YOU THINK ABOUT 3)
        (REALLY, 2 3)))
; duplicate line removed: (WHAT DO YOU THINK ABOUT 3) (REALLY, 2 3)))

(DREAMT 4
    ((0 YOU DREAMT 0)
        (REALLY, 4)
        (HAVE YOU EVER FANTASIED 4 WHILE YOU WERE AWAKE)
        (HAVE YOU DREAMT 4 BEFORE)
        (=DREAM)
        (NEWKEY)))

(DREAMED = DREAMT 4 (=DREAMT))

(DREAM 3
    ((0)
        (WHAT DOES THAT DREAM SUGGEST TO YOU)
        (DO YOU DREAM OFTEN)
        (WHAT PERSONS APPEAR IN YOUR DREAMS)
        (DON'T YOU BELIEVE THAT DREAM HAS SOMETHING TO DO WITH YOUR PROBLEM)
        (NEWKEY)))

(DREAMS = DREAM 3 (=DREAM))

(HOW (=WHAT))
(WHEN (=WHAT))
(ALIKE 10 (=DIT))
(SAME 10 (=DIT))
(CERTAINLY (=YES))

(FEEL DLIST(/BELIEF))
(THINK DLIST(/BELIEF))
(BELIEVE DLIST(/BELIEF))
(WISH DLIST(/BELIEF))

(MEMORY MY
    (0 YOUR 0 = LETS DISCUSS FURTHER WHY YOUR 3)
    (0 YOUR 0 = EARLIER YOU SAID YOUR 3)
    (0 YOUR 0 = BUT YOUR 3)
    (0 YOUR 0 = DOES THAT HAVE ANYTHING TO DO WITH THE FACT THAT YOUR 3))

(NONE
    ((0)
        (I AM NOT SURE I UNDERSTAND YOU FULLY)
        (PLEASE GO ON)
        (WHAT DOES THAT SUGGEST TO YOU)
        (DO YOU FEEL STRONGLY ABOUT DISCUSSING SUCH THINGS)))

(PERHAPS
    ((0)
        (YOU DON'T SEEM QUITE CERTAIN)
        (WHY THE UNCERTAIN TONE)
        (CAN'T YOU BE MORE POSITIVE)
        (YOU AREN'T SURE)
        (DON'T YOU KNOW)))

(MAYBE (=PERHAPS))

(NAME 15
    ((0)
        (I AM NOT INTERESTED IN NAMES)
        (I'VE TOLD YOU BEFORE, I DON'T CARE ABOUT NAMES - PLEASE CONTINUE)))
; duplicate line removed: PLEASE CONTINUE)) )

(DEUTSCH (=XFREMD))
(PRANCAIS (=XFREMD))
(ITALIANO (=XFREMD))
(ESPANOL (=XFREMD))

(XFREMD
    ((0)
        (I AM SORRY, I SPEAK ONLY ENGLISH)))

(HELLO
    ((0)
        (HOW DO YOU DO, PLEASE STATE YOUR PROBLEM)))

(COMPUTER 50
    ((0)
        (DO COMPUTERS WORRY YOU)
        (WHY DO YOU MENTION COMPUTERS)
        (WHAT DO YOU THINK MACHINES HAVE TO DO WITH YOUR PROBLEM)
        (DON'T YOU THINK COMPUTERS CAN HELP PEOPLE)
        (WHAT ABOUT MACHINES WORRIES YOU)
        (WHAT DO YOU THINK ABOUT MACHINES)))

(MACHINE 50 (=COMPUTER))
(MACHINES 50 (=COMPUTER))
(COMPUTERS 50 (=COMPUTER))

(AM = ARE
    ((0 ARE YOU 0)
        (DO YOU BELIEVE YOU ARE 4)
        (WOULD YOU WANT TO BE 4)
        (YOU WISH I WOULD TELL YOU YOU ARE 4)
        (WHAT WOULD IT MEAN IF YOU WERE 4)
        (=WHAT))
    ((0)
        (WHY DO YOU SAY 'AM')
        (I DON'T UNDERSTAND THAT)))

(ARE
    ((0 ARE I 0)
        (WHY ARE YOU INTERESTED IN WHETHER I AM 4 OR NOT)
        (WOULD YOU PREFER IF I WEREN'T 4)
        (PERHAPS I AM 4 IN YOUR FANTASIES)
        (DO YOU SOMETIMES THINK I AM 4)
        (=WHAT))
    ((0 ARE 0)
        (DID YOU THINK THEY MIGHT NOT BE 3)
        (WOULD YOU LIKE IT IF THEY WERE NOT 3)
        (WHAT IF THEY WERE NOT 3)
        (POSSIBLY THEY ARE 3)))

(YOUR = MY
    ((0 MY 0)
        (WHY ARE YOU CONCERNED OVER MY 3)
        (WHAT ABOUT YOUR OWN 3)
        (ARE YOU WORRIED ABOUT SOMEONE ELSES 3)
        (REALLY, MY 3)))

(WAS 2
    ((0 WAS YOU 0)
        (WHAT IF YOU WERE 4)
        (DO YOU THINK YOU WERE 4)
        (WERE YOU 4)
        (WHAT WOULD IT MEAN IF YOU WERE 4)
        (WHAT DOES ' 4 ' SUGGEST TO YOU)
        (=WHAT))
    ((0 YOU WAS 0)
        (WERE YOU REALLY)
        (WHY DO YOU TELL ME YOU WERE 4 NOW)
; duplicate line removed: (WERE YOU REALLY) (WHY DO YOU TELL ME YOU WERE 4 NOW)
        (PERHAPS I ALREADY KNEW YOU WERE 4))
    ((0 WAS I 0)
        (WOULD YOU LIKE TO BELIEVE I WAS 4)
        (WHAT SUGGESTS THAT I WAS 4)
        (WHAT DO YOU THINK)
        (PERHAPS I WAS 4)
        (WHAT IF I HAD BEEN 4))
    ((0)
        (NEWKEY)))

(WERE = WAS (=WAS))
(ME = YOU)

(YOU'RE = I'M
    ((0 I'M 0)
        (PRE (I ARE 3) (=YOU))))

(I'M = YOU'RE
    ((0 YOU'RE 0)
        (PRE (YOU ARE 3) (=I))))

(MYSELF = YOURSELF)
(YOURSELF = MYSELF)

(MOTHER DLIST(/NOUN FAMILY))
(MOM = MOTHER DLIST(/ FAMILY))
(DAD = FATHER DLIST(/ FAMILY))
(FATHER DLIST(/NOUN FAMILY))
(SISTER DLIST(/FAMILY))
(BROTHER DLIST(/FAMILY))
(WIFE DLIST(/FAMILY))
(CHILDREN DLIST(/FAMILY))

(I = YOU
    ((0 YOU (* WANT NEED) 0)
        (WHAT WOULD IT MEAN TO YOU IF YOU GOT 4)
        (WHY DO YOU WANT 4)
        (SUPPOSE YOU GOT 4 SOON)
        (WHAT IF YOU NEVER GOT 4)
        (WHAT WOULD GETTING 4 MEAN TO YOU)
        (WHAT DOES WANTING 4 HAVE TO DO WITH THIS DISCUSSION))
    ((0 YOU ARE 0 (*SAD UNHAPPY DEPRESSED SICK ) 0)
        (I AM SORRY TO HEAR YOU ARE 5)
        (DO YOU THINK COMING HERE WILL HELP YOU NOT TO BE 5)
        (I'M SURE ITS NOT PLEASANT TO BE 5)
        (CAN YOU EXPLAIN WHAT MADE YOU 5))
    ((0 YOU ARE 0 (*HAPPY ELATED GLAD BETTER) 0)
        (HOW HAVE I HELPED YOU TO BE 5)
        (HAS YOUR TREATMENT MADE YOU 5)
        (WHAT MAKES YOU 5 JUST NOW)
        (CAN YOU EXPLAIN WHY YOU ARE SUDDENLY 5))
    ((0 YOU WAS 0)
        (=WAS))
; duplicate line removed: ((0 YOU WAS 0) (=WAS))
    ((0 YOU (/BELIEF) YOU 0)
        (DO YOU REALLY THINK SO)
        (BUT YOU ARE NOT SURE YOU 5)
        (DO YOU REALLY DOUBT YOU 5))
    ((0 YOU 0 (/BELIEF) 0 I 0)
        (=YOU))
    ((0 YOU ARE 0)
        (IS IT BECAUSE YOU ARE 4 THAT YOU CAME TO ME)
        (HOW LONG HAVE YOU BEEN 4)
        (DO YOU BELIEVE IT NORMAL TO BE 4)
        (DO YOU ENJOY BEING 4))
    ((0 YOU (* CAN'T CANNOT) 0)
        (HOW DO YOU KNOW YOU CAN'T 4)
        (HAVE YOU TRIED)
        (PERHAPS YOU COULD 4 NOW)
        (DO YOU REALLY WANT TO BE ABLE TO 4))
    ((0 YOU DON'T 0)
        (DON'T YOU REALLY 4)
        (WHY DON'T YOU 4)
        (DO YOU WISH TO BE ABLE TO 4)
        (DOES THAT TROUBLE YOU))
    ((0 YOU FEEL 0)
        (TELL ME MORE ABOUT SUCH FEELINGS)
        (DO YOU OFTEN FEEL 4)
        (DO YOU ENJOY FEELING 4)
        (OF WHAT DOES FEELING 4 REMIND YOU))
    ((0 YOU 0 I 0)
        (PERHAPS IN YOUR FANTASY WE 3 EACH OTHER)
        (DO YOU WISH TO 3 ME)
        (YOU SEEM TO NEED TO 3 ME)
        (DO YOU 3 ANYONE ELSE))
    ((0)
        (YOU SAY 1)
        (CAN YOU ELABORATE ON THAT)
        (DO YOU SAY 1 FOR SOME SPECIAL REASON)
        (THAT'S QUITE INTERESTING)))

(YOU = I
    ((0 I REMIND YOU OF 0)
        (=DIT))
    ((0 I ARE 0)
        (WHAT MAKES YOU THINK I AM 4)
        (DOES IT PLEASE YOU TO BELIEVE I AM 4)
        (DO YOU SOMETIMES WISH YOU WERE 4)
        (PERHAPS YOU WOULD LIKE TO BE 4))
    ((0 I 0 YOU)
        (WHY DO YOU THINK I 3 YOU)
        (YOU LIKE TO THINK I 3 YOU - DON'T YOU)
        (WHAT MAKES YOU THINK I 3 YOU)
        (REALLY, I 3 YOU)
        (DO YOU WISH TO BELIEVE I 3 YOU)
; duplicate line removed: (REALLY, I 3 YOU) (DO YOU WISH TO BELIEVE I 3 YOU)
        (SUPPOSE I DID 3 YOU - WHAT WOULD THAT MEAN)
        (DOES SOMEONE ELSE BELIEVE I 3 YOU))
    ((0 I 0)
        (WE WERE DISCUSSING YOU - NOT ME)
        (OH, I 3)
        (YOU'RE NOT REALLY TALKING ABOUT ME - ARE YOU)
        (WHAT ARE YOUR FEELINGS NOW)))

(YES
    ((0)
        (YOU SEEM QUITE POSITIVE)
        (YOU ARE SURE)
        (I SEE)
        (I UNDERSTAND)))

(NO
    ((0)
        (ARE YOU SAYING 'NO' JUST TO BE NEGATIVE)
        (YOU ARE BEING A BIT NEGATIVE)
        (WHY NOT)
        (WHY 'NO')))

(MY = YOUR 2
    ((0 YOUR 0 (/FAMILY) 0)
        (TELL ME MORE ABOUT YOUR FAMILY)
        (WHO ELSE IN YOUR FAMILY 5)
        (YOUR 4)
        (WHAT ELSE COMES TO MIND WHEN YOU THINK OF YOUR 4))
    ((0 YOUR 0)
        (YOUR 3)
        (WHY DO YOU SAY YOUR 3)
        (DOES THAT SUGGEST ANYTHING ELSE WHICH BELONGS TO YOU)
        (IS IT IMPORTANT TO YOU THAT 2 3)))

(CAN
    ((0 CAN I 0)
        (YOU BELIEVE I CAN 4 DON'T YOU)
        (=WHAT)
        (YOU WANT ME TO BE ABLE TO 4)
        (PERHAPS YOU WOULD LIKE TO BE ABLE TO 4 YOURSELF))
    ((0 CAN YOU 0)
        (WHETHER OR NOT YOU CAN 4 DEPENDS ON YOU MORE THAN ON ME)
        (DO YOU WANT TO BE ABLE TO 4)
        (PERHAPS YOU DON'T WANT TO 4)
        (=WHAT)))

(WHAT
    ((0)
        (WHY DO YOU ASK)
        (DOES THAT QUESTION INTEREST YOU)
        (WHAT IS IT YOU REALLY WANT TO KNOW)
        (ARE SUCH QUESTIONS MUCH ON YOUR MIND)
        (WHAT ANSWER WOULD PLEASE YOU MOST)
        (WHAT DO YOU THINK)
        (WHAT COMES TO YOUR MIND WHEN YOU ASK THAT)
        (HAVE YOU ASKED SUCH QUESTIONS BEFORE)
        (HAVE YOU ASKED ANYONE ELSE)))

(BECAUSE
    ((0)
        (IS THAT THE REAL REASON)
        (DON'T ANY OTHER REASONS COME TO MIND)
        (DOES THAT REASON SEEM TO EXPLAIN ANYTHING ELSE)
        (WHAT OTHER REASONS MIGHT THERE BE)))

(WHY
    ((0 WHY DON'T I 0)
        (DO YOU REALLY BELIEVE I DON'T 5)
        (PERHAPS I WILL 5 IN GOOD TIME)
        (SHOULD YOU 5 YOURSELF)
        (YOU WANT ME TO 5)
        (=WHAT))
    ((0 WHY CAN'T YOU 0)
        (DO YOU THINK YOU SHOULD BE ABLE TO 5)
        (DO YOU WANT TO BE ABLE TO 5)
        (DO YOU BELIEVE THIS WILL HELP YOU TO 5)
        (HAVE YOU ANY IDEA WHY YOU CAN'T 5)
        (=WHAT)))
; duplicate line removed: (=WHAT))
; and missing final ')' added

(EVERYONE 2
    ((0 (* EVERYONE EVERYBODY NOBODY NOONE) 0)
        (REALLY, 2)
        (SURELY NOT 2)
        (CAN YOU THINK OF ANYONE IN PARTICULAR)
        (WHO, FOR EXAMPLE)
        (YOU ARE THINKING OF A VERY SPECIAL PERSON)
        (WHO, MAY I ASK)
        (SOMEONE SPECIAL PERHAPS)
        (YOU HAVE A PARTICULAR PERSON IN MIND, DON'T YOU)
        (WHO DO YOU THINK YOU'RE TALKING ABOUT)))

(EVERYBODY 2 (= EVERYONE))
(NOBODY 2 (= EVERYONE))
(NOONE 2 (= EVERYONE))

(ALWAYS 1
    ((0)
        (CAN YOU THINK OF A SPECIFIC EXAMPLE)
        (WHEN)
        (WHAT INCIDENT ARE YOU THINKING OF)
        (REALLY, ALWAYS)))

(LIKE 10
    ((0 (*AM IS ARE WAS) 0 LIKE 0)
        (=DIT))
    ((0)
        (NEWKEY)))

(DIT
    ((0)
        (IN WHAT WAY)
        (WHAT RESEMBLANCE DO YOU SEE)
        (WHAT DOES THAT SIMILARITY SUGGEST TO YOU)
        (WHAT OTHER CONNECTIONS DO YOU SEE)
        (WHAT DO YOU SUPPOSE THAT RESEMBLANCE MEANS)
        (WHAT IS THE CONNECTION, DO YOU SUPPOSE)
        (COULD THERE REALLY BE SOME CONNECTION)
        (HOW)))

()

; --- End of ELIZA script ---