\ifthenelse {\boolean{paper}}
{
\paragraph{Failure Mode function $fm$.}
We can define a `failure modes' function $fm$ that has a functional group as its range
and returns a set of failure modes as its domain.
We now use this to determine the failure modes
in our functional groups.

We can overload this function to take a {\fg} as its range and 
a set of failure modes  (being the failure modes of all the components in the {\fg})
as its domain.

}
{
Using the overloaded function $fm$ from chapter \ref{fmdef} we can determine the failure modes
in our functional groups.
}