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\subsubsection*{Dimensions of serendipity}  The four components have attributes which may be present to a greater or lesser degree. These are \emph{chance} (how likely was the trigger to appear?), \emph{curiosity} (how likely was the trigger to be identified as interesting?), \emph{sagacity} (how likely was it that the interesting trigger would be turned into a result?) and \emph{value} (how valuable is the result that is ultimately produced?).  \begin{itemize}  \item \textbf{Chance}: Fleming \citeyear{fleming} noted: ``There are  thousands of different moulds'' -- and ``that chance put the mould