to doctor
local [text sentence stuff a b c rules keywords memory]
make "memory []
print [Hello, I am the doctor. What can I do for you?]
print [Please end your remarks with an empty line.]
print []
loop
end

;; Controlling the conversation

to loop
make "text tokenize getstuff []
make "sentence getsentence :text
analyze :sentence :keywords
print []
loop
end

;; Reading and preparing the input

to getstuff :stuff
localmake "line readlist
if emptyp :line [output :stuff]
output getstuff sentence :stuff :line
end

to tokenize :text
output map.se [tokenword ? "] :text
end

to tokenword :word :out
if emptyp :word [output :out]
if memberp first :word [, " ] [output tokenword butfirst :word :out]
if memberp first :word [. ? ! |;|] [output sentence :out ".]
output tokenword butfirst :word word :out first :word
end

to getsentence :text
make "keywords []
output getsentence1 decapitalize :text []
end

to getsentence1 :text :out
if emptyp :text [output :out]
if equalp first :text ". ~
   [ifelse emptyp :keywords ~
           [output getsentence1 decapitalize butfirst :text []] [output :out]]
checkpriority first :text
output getsentence1 butfirst :text sentence :out translate first :text
end

to decapitalize :text
if emptyp :text [output []]
output fput lowercase first :text butfirst :text
end

to checkpriority :word
localmake "priority gprop :word "priority
if emptyp :priority [stop]
if emptyp :keywords [make "keywords ( list :word ) stop]
ifelse :priority > ( gprop first :keywords "priority ) ~
       [make "keywords fput :word :keywords] ~
       [make "keywords lput :word :keywords]
end

to translate :word
localmake "new gprop :word "translation
output ifelse emptyp :new [:word] [:new]
end

;; Choosing the rule and replying

to analyze :sentence :keywords
local [rules keyword]
if emptyp :keywords [norules stop]
make "keyword first :keywords
make "rules gprop :keyword "rules
if wordp first :rules ~
   [make "keyword first :rules make "rules gprop :keyword "rules]
checkrules :keyword :rules
end

to checkrules :keyword :rules
if not match first :rules :sentence ~
   [checkrules :keyword butfirst butfirst :rules stop]
dorule first butfirst :rules
end

to dorule :rule
localmake "print first gprop :keyword :rule
pprop :keyword :rule lput :print butfirst gprop :keyword :rule
if equalp :print "newkey [analyze :sentence butfirst :keywords stop]
if wordp :print [checkrules :print gprop :print "rules stop]
if equalp first :print "pre ~
   [analyze reconstruct first butfirst :print butfirst butfirst :print stop]
print capitalize reconstruct :print
memory :keyword :sentence
end

to reconstruct :sentence
if emptyp :sentence [output []]
if not equalp ": first first :sentence ~
   [output fput first :sentence reconstruct butfirst :sentence]
output sentence reword first :sentence reconstruct butfirst :sentence
end

to reword :word
if memberp last :word [. ? ,] [output addpunct reword butlast :word last :word]
output thing butfirst :word
end

to addpunct :stuff :char
if wordp :stuff [output word :stuff :char]
if emptyp :stuff [output :char]
output sentence butlast :stuff word last :stuff :char
end

to capitalize :text
if emptyp :text [output []]
output fput (word uppercase first first :text butfirst first :text) butfirst :text
end

to memory :keyword :sentence
local [rules rule name]
make "rules gprop :keyword "memr
if emptyp :rules [stop]
if not match first :rules :sentence [stop]
make "name last :rules
make "rules gprop :keyword :name
make "rule first :rules
pprop :keyword :name lput :rule butfirst :rules
make "memory fput reconstruct :sentence :memory
end

to norules
ifelse :memflag [usememory] [lastresort]
make "memflag not :memflag
end

to lastresort
print first :lastresort
make "lastresort lput first :lastresort butfirst :lastresort
end

to usememory
if emptyp :memory [lastresort stop]
print capitalize first :memory
make "memory butfirst :memory
end

;; Predicates for patterns

to beliefp :word
output not emptyp gprop :word "belief
end

to familyp :word
output not emptyp gprop :word "family
end

;; Procedures for adding to the script

to addrule :word :pattern :results
localmake "propname gensym
pprop :word "rules (sentence gprop :word "rules list :pattern :propname)
pprop :word :propname :results
end

to addmemr :word :pattern :results
localmake "propname gensym
pprop :word "memr (sentence gprop :word "memr list :pattern :propname)
pprop :word :propname :results
end

;; data

make "gensym.number 80

make "lastresort [[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?]]

make "memflag "false

pprop "alike "priority 10
pprop "alike "rules [dit]

pprop "always "priority 1
pprop "always "rules [[#] g69]
pprop "always "g69 [[Can you think of a specific example?] [When?]
                    [What incident are you thinking of?]
                    [Really, always?] [What if this never happened?]]

pprop "am "priority 0
pprop "am "translation "are
pprop "am "rules [[# are you #stuff] g18 [#] g19]
pprop "am "g18 [[Do you believe you are :stuff?] [Would you want to be :stuff?]
                [You wish I would tell you you are :stuff.]
                [What would it mean if you were :stuff?] how]
pprop "am "g19 [[Why do you say "am"?] [I don't understand that.]]

pprop "are "priority 0
pprop "are "rules [[#a there are #b you #c] g20 [# there are &stuff] g21
                   [# are I #stuff] g22 [are #] g23 [# are #stuff] g24]
pprop "are "g20 [[pre [:a there are :b] are]]
pprop "are "g21 [[What makes you think there are :stuff?]
                 [Do you usually consider :stuff?]
                 [Do you wish there were :stuff?]]
pprop "are "g22 [[Why are you interested in whether I am :stuff or not?]
                 [Would you prefer if I weren't :stuff?]
                 [Perhaps I am :stuff in your fantasies.]
                 [Do you sometimes think I am :stuff?] how]
pprop "are "g23 [how]
pprop "are "g24 [[Did you think they might not be :stuff?]
                 [Would you like it if they were not :stuff?]
                 [What if they were not :stuff?] [Possibly they are :stuff.]]

pprop "ask "priority 0
pprop "ask "rules [[# you ask #] g77 [# you ! asking #] g78 [# I #] g79 [#] g80]
pprop "ask "g77 [how]
pprop "ask "g78 [how]
pprop "ask "g79 [you]
pprop "ask "g80 [newkey]

pprop "because "priority 0
pprop "because "rules [[#] g64]
pprop "because "g64 [[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?]
                     [You're not concealing anything from me, are you?]]

pprop "believe "belief "true

pprop "bet "belief "true

pprop "brother "family "true

pprop "can "priority 0
pprop "can "rules [[# can I #stuff] g58 [# can you #stuff] g59 [#] g60]
pprop "can "g58 [[You believe I can :stuff, don't you?] how
                 [You want me to be able to :stuff.]
                 [Perhaps you would like to be able to :stuff yourself.]]
pprop "can "g59 [[Whether or not you can :stuff depends more on you than on me.]
                 [Do you want to be able to :stuff?]
                 [Perhaps you don't want to :stuff.] how]
pprop "can "g60 [how newkey]

pprop "cant "translation "can't

pprop "certainly "priority 0
pprop "certainly "rules [yes]

pprop "children "family "true

pprop "computer "priority 50
pprop "computer "rules [[#] g17]
pprop "computer "g17 [[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?]]

pprop "computers "priority 50
pprop "computers "rules [computer]

pprop "dad "translation "father
pprop "dad "family "true

pprop "daddy "translation "father
pprop "daddy "family "true

pprop "deutsch "priority 0
pprop "deutsch "rules [[#] g15]
pprop "deutsch "g15 [[I'm sorry, I speak only English.]]

pprop "dit "rules [[#] g72]
pprop "dit "g72 [[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]

pprop "dont "translation "don't

pprop "dream "priority 3
pprop "dream "rules [[#] g9]
pprop "dream "g9 [[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?]
                  [Do you ever wish you could flee from reality?] newkey]

pprop "dreamed "priority 4
pprop "dreamed "rules [[# you dreamed #stuff] g7 [#] g8]
pprop "dreamed "g7 [[Really :stuff?]
                    [Have you ever fantasied :stuff while you were awake?]
                    [Have you dreamed :stuff before?] dream newkey]
pprop "dreamed "g8 [dream newkey]

pprop "dreams "translation "dream
pprop "dreams "priority 3
pprop "dreams "rules [dream]

pprop "dreamt "translation "dreamed
pprop "dreamt "priority 4
pprop "dreamt "rules [dreamed]

pprop "espanol "priority 0
pprop "espanol "rules [deutsch]

pprop "everybody "priority 2
pprop "everybody "rules [everyone]

pprop "everyone "priority 2
pprop "everyone "rules [[# !a:in [everyone everybody nobody noone] #] g68]
pprop "everyone "g68 [[Really, :a?] [Surely not :a.]
                      [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?]
                      [I suspect you're exaggerating a little.]]

pprop "father "family "true

pprop "feel "belief "true

pprop "francais "priority 0
pprop "francais "rules [deutsch]

pprop "hello "priority 0
pprop "hello "rules [[#] g16]
pprop "hello "g16 [[How do you do. Please state your problem.]]

pprop "how "priority 0
pprop "how "rules [[#] g63]
pprop "how "g63 [[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?]]

pprop "husband "family "true

pprop "i "priority 0
pprop "i "translation "you
pprop "i "rules [[# you !:in [want need] #stuff] g32
                 [# you are # !stuff:in [sad unhappy depressed sick] #] g33
                 [# you are # !stuff:in [happy elated glad better] #] g34
                 [# you was #] g35 [# you !:beliefp you #stuff] g36
                 [# you # !:beliefp # i #] g37 [# you are #stuff] g38
                 [# you !:in [can't cannot] #stuff] g39
                 [# you don't #stuff] g40 [# you feel #stuff] g41
                 [# you #stuff i #] g42 [#stuff] g43]
pprop "i "g32 [[What would it mean to you if you got :stuff?]
               [Why Do you want :stuff?] [Suppose you got :stuff soon.]
               [What if you never got :stuff?]
               [What would getting :stuff mean to you?] [You really want :stuff.]
               [I suspect you really don't want :stuff.]]
pprop "i "g33 [[I'm sorry to hear you are :stuff.]
               [Do you think coming here will help you not to be :stuff?]
               [I'm sure it's not pleasant to be :stuff.]
               [Can you explain what made you :stuff?] [Please go on.]]
pprop "i "g34 [[How have I helped you to be :stuff?]
               [Has your treatment made you :stuff?]
               [What makes you :stuff just now?]
               [Can you explain why you are suddenly :stuff?]
               [Are you sure?] [What do you mean by :stuff?]]
pprop "i "g35 [was]
pprop "i "g36 [[Do you really think so?] [But you are not sure you :stuff.]
               [Do you really doubt you :stuff?]]
pprop "i "g37 [you]
pprop "i "g38 [[Is it because you are :stuff that you came to me?]
               [How long have you been :stuff?]
               [Do you believe it normal to be :stuff?] [Do you enjoy being :stuff?]]
pprop "i "g39 [[How do you know you can't :stuff?] [Have you tried?]
               [Perhaps you could :stuff now.]
               [Do you really want to be able to :stuff?]]
pprop "i "g40 [[Don't you really :stuff?] [Why don't you :stuff?]
               [Do you wish to be able to :stuff?] [Does that trouble you?]]
pprop "i "g41 [[Tell me more about such feelings.] [Do you often feel :stuff?]
               [Do you enjoy feeling :stuff?]
               [Of what does feeling :stuff remind you?]]
pprop "i "g42 [[Perhaps in your fantasy we :stuff each other.]
               [Do you wish to :stuff me?] [You seem to need to :stuff me.]
               [Do you :stuff anyone else?]]
pprop "i "g43 [[You say :stuff.] [Can you elaborate on that?]
               [Do you say :stuff for some special reason?]
               [That's quite interesting.]]

pprop "i'm "priority 0
pprop "i'm "translation "you're
pprop "i'm "rules [[# you're #stuff] g31]
pprop "i'm "g31 [[pre [you are :stuff] I]]

pprop "if "priority 3
pprop "if "rules [[#a if #b had #c] g5 [# if #stuff] g6]
pprop "if "g5 [[pre [:a if :b might have :c] if]]
pprop "if "g6 [[Do you think it's likely that :stuff?] [Do you wish that :stuff?]
               [What do you think about :stuff?]]

pprop "is "priority 0
pprop "is "rules [[&a is &b] g61 [#] g62]
pprop "is "g61 [[Suppose :a were not :b.] [Perhaps :a really is :b.]
                [Tell me more about :a.]]
pprop "is "g62 [newkey]

pprop "italiano "priority 0
pprop "italiano "rules [deutsch]

pprop "like "priority 10
pprop "like "rules [[# !:in [am is are was] # like #] g70 [#] g71]
pprop "like "g70 [dit]
pprop "like "g71 [newkey]

pprop "machine "priority 50
pprop "machine "rules [computer]

pprop "machines "priority 50
pprop "machines "rules [computer]

pprop "maybe "priority 0
pprop "maybe "rules [perhaps]

pprop "me "translation "you

pprop "mom "translation "mother
pprop "mom "family "true

pprop "mommy "translation "mother
pprop "mommy "family "true

pprop "mother "family "true

pprop "my "priority 2
pprop "my "translation "your
pprop "my "rules [[# your # !a:familyp #b] g55 [# your &stuff] g56 [#] g57]
pprop "my "g55 [[Tell me more about your family.] [Who else in your family :b?]
                [Your :a?] [What else comes to mind when you think of your :a?]]
pprop "my "g56 [[Your :stuff?] [Why do you say your :stuff?]
                [Does that suggest anything else which belongs to you?]
                [Is it important to you that your :stuff?]]
pprop "my "g57 [newkey]
pprop "my "memr [[# your &stuff] g12]
pprop "my "g12 [[Earlier you said your :stuff.] [But your :stuff.]
                [Does that have anything to do with your statement about :stuff?]]

pprop "myself "translation "yourself

pprop "name "priority 15
pprop "name "rules [[#] g14]
pprop "name "g14 [[I am not interested in names.]
                  [I've told you before I don't care about names\; please continue.]]

pprop "no "priority 0
pprop "no "rules [[no] g53 [#] g54]
pprop "no "g53 [xxyyzz [pre [x no] no]]
pprop "no "g54 [[Are you saying "no" just to be negative?]
                [You are being a bit negative.] [Why not?] [Why "no"?] newkey]

pprop "nobody "priority 2
pprop "nobody "rules [everyone]

pprop "noone "priority 2
pprop "noone "rules [everyone]

pprop "perhaps "priority 0
pprop "perhaps "rules [[#] g13]
pprop "perhaps "g13 [[You don't seem quite certain.] [Why the uncertain tone?]
                     [Can't you be more positive?] [You aren't sure.]
                     [Don't you know?]]

pprop "problem "priority 5
pprop "problem "rules [[#a !b:in [is are] your !c:in [problem problems] #] g73
                       [# your !a:in [problem problems] !b:in [is are] #c] g74
                       [#] g75]
pprop "problem "g73 [[:a :b your :c.] [Are you sure :a :b your :c?]
                     [Perhaps :a :b not your real :c.]
                     [You think you have problems?]
                     [Do you often think about :a?]]
pprop "problem "g74 [[Your :a :b :c?] [Are you sure your :a :b :c?]
                     [Perhaps your real :a :b not :c.] [You think you have problems?]]
pprop "problem "g75 [[Please continue, this may be interesting.]
                     [Have you any other problems you wish to discuss?]
                     [Perhaps you'd rather change the subject.]
                     [You seem a bit uneasy.] newkey]
pprop "problem "memr [[#stuff is your problem #] g76]
pprop "problem "g76 [[Earlier you mentioned :stuff.]
                     [Let's talk further about :stuff.]
                     [Tell me more about :stuff.]
                     [You haven't mentioned :stuff for a while.]]

pprop "problems "priority 5
pprop "problems "rules [problem]

pprop "remember "priority 5
pprop "remember "rules [[# you remember #stuff] g2 [# do I remember #stuff] g3 [#] g4]
pprop "remember "g2 [[Do you often think of :stuff?]
                     [Does thinking of :stuff bring anything else to mind?]
                     [What else do you remember?]
                     [Why do you remember :stuff just now?]
                     [What in the present situation reminds you of :stuff?]]
pprop "remember "g3 [[Did you think I would forget :stuff?]
                     [Why do you think I should recall :stuff now?]
                     [What about :stuff?] what [You mentioned :stuff.]]
pprop "remember "g4 [newkey]

pprop "same "priority 10
pprop "same "rules [dit]

pprop "sister "family "true

pprop "sorry "priority 0
pprop "sorry "rules [[#] g1]
pprop "sorry "g1 [[Please don't apologize.] [Apologies are not necessary.]
                  [What feelings do you have when you apologize?]
                  [I've told you that apologies are not required.]]

pprop "svenska "priority 0
pprop "svenska "rules [deutsch]

pprop "think "belief "true

pprop "was "priority 2
pprop "was "rules [[# was you #stuff] g26 [# you was #stuff] g27
                   [# was I #stuff] g28 [#] g29]
pprop "was "g26 [[What if you were :stuff?] [Do you think you were :stuff?]
                 [Were you :stuff?] [What would it mean if you were :stuff?]
                 [What does " :stuff " suggest to you?] how]
pprop "was "g27 [[Were you really?] [Why do you tell me you were :stuff now?]
                 [Perhaps I already knew you were :stuff.]]
pprop "was "g28 [[Would you like to believe I was :stuff?]
                 [What suggests that I was :stuff?] [What do you think?]
                 [Perhaps I was :stuff.] [What if I had been :stuff?]]
pprop "was "g29 [newkey]

pprop "we "translation "you
pprop "we "priority 0
pprop "we "rules [I]

pprop "were "priority 0
pprop "were "translation "was
pprop "were "rules [was]

pprop "what "priority 0
pprop "what "rules [[!:in [what where] #] g10 [# !a:in [what where] #b] g11]
pprop "what "g10 [how]
pprop "what "g11 [[Tell me about :a :b.] [:a :b?] [Do you want me to tell you :a :b?]
                  [Really.] [I see.] newkey]

pprop "where "priority 0
pprop "where "rules [how]

pprop "why "priority 0
pprop "why "rules [[# why don't I #stuff] g65 [# why can't you #stuff] g66 [#] g67]
pprop "why "g65 [[Do you believe I don't :stuff?]
                 [Perhaps I will :stuff in good time.]
                 [Should you :stuff yourself?] [You want me to :stuff?] how]
pprop "why "g66 [[Do you think you should be able to :stuff?]
                 [Do you want to be able to :stuff?]
                 [Do you believe this will help you to :stuff?]
                 [Have you any idea why you can't :stuff?] how]
pprop "why "g67 [[Why indeed?] [Why "why"?] [Why not?] how newkey]

pprop "wife "family "true

pprop "wish "belief "true

pprop "wont "translation "won't

pprop "xxyyzz "priority 0
pprop "xxyyzz "rules [[#] g50]
pprop "xxyyzz "g50 [[You're being somewhat short with me.]
                    [You don't seem very talkative today.]
                    [Perhaps you'd rather talk about something else.]
                    [Are you using monosyllables for some reason?] newkey]

pprop "yes "priority 0
pprop "yes "rules [[yes] g51 [#] g52]
pprop "yes "g51 [xxyyzz [pre [x yes] yes]]
pprop "yes "g52 [[You seem quite positive.] [You are sure.] [I see.]
                 [I understand.] newkey]

pprop "you "priority 0
pprop "you "translation "I
pprop "you "rules [[# I remind you of #] g44 [# I are # you #] g45
                   [# I # are #stuff] g46 [# I #stuff you] g47
                   [# I &stuff] g48 [#] g49]
pprop "you "g44 [dit]
pprop "you "g45 [newkey]
pprop "you "g46 [[What makes you think I am :stuff?]
                 [Does it please you to believe I am :stuff?]
                 [Perhaps you would like to be :stuff.]
                 [Do you sometimes wish you were :stuff?]]
pprop "you "g47 [[Why do you think I :stuff you?]
                 [You like to think I :stuff you, don't you?]
                 [What makes you think I :stuff you?] [Really, I :stuff you?]
                 [Do you wish to believe I :stuff you?]
                 [Suppose I did :stuff you. what would that mean?]
                 [Does someone else believe I :stuff you?]]
pprop "you "g48 [[We were discussing you, not me.] [Oh, I :stuff?]
                 [Is this really relevant to your problem?] [Perhaps I do :stuff.]
                 [Are you glad to know I :stuff?] [Do you :stuff?]
                 [What are your feelings now?]]
pprop "you "g49 [newkey]

pprop "you're "priority 0
pprop "you're "translation "I'm
pprop "you're "rules [[# I'm #stuff] g30]
pprop "you're "g30 [[pre [I are :stuff] you]]

pprop "your "priority 0
pprop "your "translation "my
pprop "your "rules [[# my #stuff] g25]
pprop "your "g25 [[Why are you concerned over my :stuff?]
                  [What about your own :stuff?]
                  [Are you worried about someone else's :stuff?]
                  [Really, my :stuff?]]

pprop "yourself "translation "myself


to match :pat :sen
local [special.var special.pred special.buffer in.list]
if or wordp :pat wordp :sen [output "false]
if emptyp :pat [output emptyp :sen]
if listp first :pat [output special fput "!: :pat :sen]
if memberp first first :pat [? # ! & @ ^] [output special :pat :sen]
if emptyp :sen [output "false]
if equalp first :pat first :sen [output match butfirst :pat butfirst :sen]
output "false
end

;; Parsing quantifiers

to special :pat :sen
set.special parse.special butfirst first :pat "
output run word "match first first :pat
end

to parse.special :word :var
if emptyp :word [output list :var "always]
if equalp first :word ": [output list :var butfirst :word]
output parse.special butfirst :word word :var first :word
end

to set.special :list
make "special.var first :list
make "special.pred last :list
if emptyp :special.var [make "special.var "special.buffer]
if memberp :special.pred [in anyof] [set.in]
if not emptyp :special.pred [stop]
make "special.pred first butfirst :pat
make "pat fput first :pat butfirst butfirst :pat
end

to set.in
make "in.list first butfirst :pat
make "pat fput first :pat butfirst butfirst :pat
end

;; Exactly one match

to match!
if emptyp :sen [output "false]
if not try.pred [output "false]
make :special.var first :sen
output match butfirst :pat butfirst :sen
end

;; Zero or one match

to match?
make :special.var []
if emptyp :sen [output match butfirst :pat :sen]
if not try.pred [output match butfirst :pat :sen]
make :special.var first :sen
if match butfirst :pat butfirst :sen [output "true]
make :special.var []
output match butfirst :pat :sen
end

;; Zero or more matches

to match#
make :special.var []
output #test #gather :sen
end

to #gather :sen
if emptyp :sen [output :sen]
if not try.pred [output :sen]
make :special.var lput first :sen thing :special.var
output #gather butfirst :sen
end

to #test :sen
if match butfirst :pat :sen [output "true]
if emptyp thing :special.var [output "false]
output #test2 fput last thing :special.var :sen
end

to #test2 :sen
make :special.var butlast thing :special.var
output #test :sen
end

;; One or more matches

to match&
output &test match#
end

to &test :tf
if emptyp thing :special.var [output "false]
output :tf
end

;; Zero or more matches (as few as possible)

to match^
make :special.var []
output ^test :sen
end

to ^test :sen
if match butfirst :pat :sen [output "true]
if emptyp :sen [output "false]
if not try.pred [output "false]
make :special.var lput first :sen thing :special.var
output ^test butfirst :sen
end

;; Match words in a group

to match@
make :special.var :sen
output @test []
end

to @test :sen
if @try.pred [if match butfirst :pat :sen [output "true]]
if emptyp thing :special.var [output "false]
output @test2 fput last thing :special.var :sen
end

to @test2 :sen
make :special.var butlast thing :special.var
output @test :sen
end

;; Applying the predicates

to try.pred
if listp :special.pred [output match :special.pred first :sen]
output run list :special.pred quoted first :sen
end

to quoted :thing
if listp :thing [output :thing]
output word "" :thing
end

to @try.pred
if listp :special.pred [output match :special.pred thing :special.var]
output run list :special.pred thing :special.var
end

;; Special predicates

to always :x
output "true
end

to in :word
output memberp :word :in.list
end

to anyof :sen
output anyof1 :sen :in.list
end

to anyof1 :sen :pats
if emptyp :pats [output "false]
if match first :pats :sen [output "true]
output anyof1 :sen butfirst :pats
end