# tufte document classes break with multiple authors

The following MWE (or MNWE) breaks with the error

Extra \fi. <argument> ...rrenvir \else \@badend {tabular}\fi \expandafter \endgroup \if... l.5 \author{You \and me}

Removing the \and command fixes it. tufte-book throws the same error. article or similar classes, of course, don't, and neither will the tufte classes break if the \and is removed.

\documentclass{tufte-handout}
\author{You \and me}
\date{\today}
\begin{document}
\maketitle
\end{document}

• tufte doesn't define \and you have to type You and Me or You, me. That all. If not you have to define \author by yourself. – user11232 Aug 23 '14 at 13:05
• @HarishKumar Indeed, especially if you can shed light on whether that's by design or just an omission, but I'll accept it as an answer either way unless someone else has more information – ThomasH Sep 1 '14 at 17:04
• @PaulGessler I just did :-) – user11232 Sep 3 '14 at 6:50

tufte class doesn't define \and. Though I can not say whether it is by design or the authors missed it by accident precisely, I am inclined to believe that it is a design decision by the authors.
If you have to print two authors, you will have limited options like typing You and Me or You, Me by yourself. If not happy with this, you will have to define your own \and. But for this additional details like what that \and should do etc are needed and I beleive, is out of scope here.