Use of toggle in latex

etoggle.tex

\usepackage{etoolbox}


\newtoggle{final}
\newtoggle{blind}
%\togglefalse{final}
\toggletrue{final}
%\toggletrue{blind}
\togglefalse{blind}

% define a mc=margincomment command
\iftoggle{final}{
   \newcommand{\mc}[2]{#1} % make margincomments go away
   \newcommand{\tc}[2]{#1} % make text comments go away
}%else
{
   \newcommand{\mc}[2]{% 1 referenced text 2 initials 3 comment
       \textcolor{blue}{#1}
       \marginpar{\scriptsize\textbf\raggedright\textcolor{red}{#2}}}
  \newcommand{\tc}[2]{\textcolor{blue}{#1}[\textcolor{red}{#2}]}
}

\begin{document}
\iftoggle{blind}{}{Much of the work developing this paper occurred while Mark Kutzbach was an employee of the U.S. Census Bureau.}}\\

\end{document}