*\input phoubl.tex[ess,jmc]
 (phoubl.tex[ess,jmc] 1 2 (macro.tex[let,jmc] 1 (basic.TEX 1 2 3 4)) 3 [1] 4 [2] 5 6 [3] 7 [4] 8 9 [5] 10 11 [6] 12 [7] 13
! You can't do that in horizontal mode.
p.13,l.18 \d $a$:\ \ \{
                       \sl s:=result(p,turn-right,s);}\e
↑
! Too many }'s.
p.13,l.18 \d $a$:\ \ \{\sl s:=result(p,turn-right,s);}
                                                      \e
↑
! You can't do that in horizontal mode.
p.13,l.19 \d $c$:\ \ \{
                       \sl s:=result(p,walk-a-block,s);}\e
↑
! Too many }'s.
p.13,l.19 \d $c$:\ \ \{\sl s:=result(p,walk-a-block,s);}
                                                        \e
↑
Overfull box, 16.8423 points too wide:
\hbox( 7.5000 + 2.5000)x 469.7550, glueset-1.0000
.\:a d
.\:a i
.\:a '173
.\:a e
.\:a r
.etc. [8] 14 15 [9]
Overfull box, 10.9302 points too wide:
\hbox( 7.5000 + 2.5000)x 469.7550, glueset-1.0000
.\:n f
.\:n o
.\:n r
.\glue 3.3333 plus 1.6667 minus 1.1111
.\:n p
.etc.
Overfull box, 18.2080 points too wide:
\hbox( 7.5000 + 2.5000)x 469.7550, glueset-1.0000
.\:n w
.\kern-.2778
.\:n e
.\glue 3.3333 plus 1.6667 minus 1.1111
.\:n l
.etc. 16
Overfull box, 2.6384 points too wide:
\hbox( 7.5000 + 2.5000)x 469.7550, glueset-1.0000
.\hbox( 6.4444 + .0000)x 35.0000, glueset .0000
..\glue .0000 plus 10000000000.0000
..\glue 3.3333 plus 1.6667 minus 1.1111
..\:n 4
..\:n .
..\glue 4.4444 plus 5.0000 minus .3704
..etc.
.\kern .5000
.\hyphenation0
.\:u 8
.\:g s
.etc. [10]
Overfull box, 4.0134 points too wide:
\hbox( 7.5000 + 2.5000)x 469.7550
.\hbox( .0000 + .0000)x 20.0000
.\kern .5000
.\hyphenation0
.\:g i
.\:g n
.etc.
Overfull box, 6.3745 points too wide:
\hbox( 7.5000 + 2.5000)x 469.7550, glueset-1.0000
.\hbox( .0000 + .0000)x 35.0000, glueset .0000
..\glue .0000 plus 10000000000.0000
..\glue 3.3333 plus 1.6667 minus 1.1111
..\glue 3.3333 plus 1.6667 minus 1.1111
..\glue 3.3333 plus 1.6667 minus 1.1111
..\glue 3.3333 plus 1.6667 minus 1.1111
..etc.
.\kern .5000
.\hyphenation0
.\:u 8
.\:g s
.etc.
Overfull box, 4.8884 points too wide:
\hbox( 7.5000 + 2.5000)x 434.7550, glueset-1.0000
.\:g h
.\:g a
.\:g s
.\:a (
.\:g p
.etc. 17 18 [11]
! Too many }'s.
p.18,l.37 \noindent  {\bf Possible meanings of `can'} for a computer program}
                                                                             
↑
 19 [12] 20 [13]
Overfull box, 2.1895 points too wide:
\hbox( 6.9444 + 1.9444)x 469.7550, glueset-1.0000
.\hbox( .0000 + .0000)x 20.0000
.\:n S
.\:n u
.\:n p
.\:n p
.etc. 21
! Missing } inserted.
<to be read again> 
                   $
<argument> ... at(q,home(q),s) ⊃ ⊗normally(in$
                                              -$conversation(p,q,\cr ⊗\qquad \...
...spstyle {\null ##}$\hfill \cr #1
                                   }}
p.21,l.42        ⊗\qquad\null result(p,dials(phone$-$number(q)),s)))\cr}
                                                                        $$
↑
! Extra }.
<vlist> }
         $\hfill \ENDV
<argument> ...mally(in$-$conversation(p,q,\cr 
                                              ⊗\qquad \null result(p,dials(pho...
...spstyle {\null ##}$\hfill \cr #1
                                   }}
p.21,l.42        ⊗\qquad\null result(p,dials(phone$-$number(q)),s)))\cr}
                                                                        $$
↑
! Missing } inserted.
<to be read again> 
                   $
<argument> ...quad \null result(p,dials(phone$
                                              -$number(q)),s)))\cr 
...spstyle {\null ##}$\hfill \cr #1
                                   }}
p.21,l.42        ⊗\qquad\null result(p,dials(phone$-$number(q)),s)))\cr}
                                                                        $$
↑
! Extra }.
<vlist> }
         $\hfill \ENDV
<argument> ...ials(phone$-$number(q)),s)))\cr 
                                              
...spstyle {\null ##}$\hfill \cr #1
                                   }}
p.21,l.42        ⊗\qquad\null result(p,dials(phone$-$number(q)),s)))\cr}
                                                                        $$
↑
! Missing } inserted.
<to be read again> 
                   $
<argument> ∀s . kaput(Phone$
                            -$system,s) ⊃ ¬ in$-$conversatio...
...spstyle {\null ##}$\hfill \cr #1
                                   }}
p.21,l.57           ⊗\qquad\null number(q)),s))\cr}
                                                   $$
↑
! Extra }.
<vlist> }
         $\ENDV
<argument> ...n$-$conversation (p,q,result(p,⊗
                                              dials(phone-\cr ⊗\qquad \null nu...
...spstyle {\null ##}$\hfill \cr #1
                                   }}
p.21,l.57           ⊗\qquad\null number(q)),s))\cr}
                                                   $$
↑
 22 [14] 23 [15] 24 [16] 25 26 [17] 27 [18] 28 29 [19] 30 31 [20] 32 [21] 33
Overfull box, 2.0784 points too wide:
\hbox( 7.5000 + 2.5000)x 469.7550, glueset-1.0000
.\:q A
.\:q q
.\:q v
.\:q i
.\:q s
.etc. 34
Overfull box, 7.3192 points too wide:
\hbox( 7.5000 + 2.5000)x 469.7550, glueset-1.0000
.\:q G
.\:q r
.\:q e
.\:q e
.\:q n
.etc. [22] 35 [23] [24]