deletions | additions       diff --git a/Swimmers.tex b/Swimmers.tex  index 2f4701d..917ae4b 100644  --- a/Swimmers.tex  +++ b/Swimmers.tex 
...
\item What does the scatter in trajectories tell us about the system? Anything useful? Use linear-response theory (is this justified? Why?).  \end{enumerate}   \item Then consider a single active swimmer in a concentration gradient. Get superposition of two behaviours. behaviours?  \end{enumerate}