diff -r dd1499f296ea -r d43f46423298 Paper.thy --- a/Paper.thy Fri Sep 06 12:55:12 2013 +0100 +++ b/Paper.thy Fri Sep 06 13:27:46 2013 +0100 @@ -534,7 +534,7 @@ \noindent Clearly the operating system should only allow to clone a process @{text p} if the process is currently alive. The cloned process will get the process - ID ``randomly'' generated by the operating system, but this process ID should + ID generated by the operating system, but this process ID should not already exist. The admissibility rules for the other events impose similar conditions. However, the admissibility check by the operating system is only one