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% draft of Answers to Exercises
\chapterbegin Appendix A. Answers to\\all the\\Exercises.

\def\ansno#1: {\smallskip\item{#1}\hangindent 0pt}

\ansno 1.1: A \TeX nician (underpaid); sometimes also called a \TeX acker.

\ansno 2.1: |Alice said, ``I always use an en-dash instead of a hyphen|\ttspace
|when specifying page numbers like `481--497' in a bibliography.''| \ 
(The wrong answer to this question ends with |'48l-497' in a bibliography."|)

\ansno 2.2: You get em-dash and hyphen (----), which looks awful.

\ansno 2.3: |``\thinspace`|; and either |`{}``| or |{`}``| or something similar.

\ansno 2.4: Eliminating ↑{:thinspace} would mean that a user need not learn
the term; but it is not advisable to minimize terminology by ``overloading''
math mode with tricky constructions. For example, a user who wishes to
take advantage of \TeX's ↑{:mathsurround} feature would be thwarted by
non-mathematical uses of dollar signs. \ (Incidentally, neither |\thinspace|
nor ↑{:\,} are built into \TeX; both are defined in terms of more
primitive features, in Appendix@B.)