\documentclass{article}
\usepackage{amsthm}

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\theoremstyle{plain}
\newtheorem{theorem}{Theorem}[section]
\newtheorem{proposition}[theorem]{Proposition}
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\begin{document}

This is true by (citation). \web{Here is a detailed explanation of why...}

More stuff.

\begin{theorem}[Wiles]\label{thm:wiles}
Fermat's Last Theorem is false.  Not. 
\end{theorem}


\begin{enumerate}
\item First thing.\label{one}
\item second thing.\label{two}
\end{enumerate}

Recall Theorem~\ref{thm:wiles}.


\newpage

There was strange theorem on page~\pageref{thm:wiles}.

Also remember number~\ref{two} on page~\pageref{thm:wiles}.



\end{document}